Confirm that a lock is good or bad, in addition to the appearance of solid and strong material, the most important factor is the safety factor from the lock cylinder, the market is mainly classified into three categories: A-level, B-level and C-level, needless to say, many people Also know that the C-type lock cylinder is certainly the best anti-theft feature, then the market C-type lock cylinder anti-theft lock brand many, which is good? How to buy a c-class lock cylinder? Then we come and see! C-level lock core top ten brands recommended : 1, c-level lock core top ten brands: Panpan (Panpan c-type cylinder lock cylinder is produced in Liaoning, China. It is a large-scale enterprise engaged in the development, production and sales of new building materials. It has been named China's well-known trademark. 2, c-level lock core top ten brands: Bao Dean Baodean c-stage lock cylinder is a brand product under the Zhejiang Baodean Security Products Co., Ltd. The company is mainly engaged in the design, production, sales and service of locks. After many years of hard work, the company produced security doors. The lock was rated as a famous anti-theft door lock core brand. 3, c-level lock core top ten brands: step Yang The step-c level c-lock cylinder is a brand product under the China Step Group and is currently one of the largest production bases and export bases for security doors in China. It has been awarded as a patent model enterprise in Zhejiang Province. 4, c-level lock core top ten brands: Wang Li (Wang Li c-class lock cylinder is a well-known trademark in China, has a long history of development in the industry, mainly engaged in lock research and development, production and sales as one, is now rated as China's 500 most valuable brands. 5, c-level lock core top ten brands: Wan Jia Wanjia c-level lock core is a brand product under the China Wanjia Group Co., Ltd. After years of development, the company has been rated as China's well-known trademark, and it is also one of the top ten foreign export enterprises. 6, c-class lock core top ten brands: gold dot atom Jindian Atomic C-Class Cylinder is a branded product of private technology companies in Guangdong Province. The company is mainly engaged in R & D and production of anti-theft locks and car locks. After years of hard work, the locks produced by the company are rated as the leading domestic locks. Core brand. 7, c-level lock core top ten brands: Murray The Morrison c-class lock cylinder is a brand product of Zhejiang Meilibao Lock Co., Ltd. The company is mainly engaged in the research and development, production, and sales of lock cylinders. The lock products produced in the industry are influential in the industry. Greatly, it was named the top ten anti-theft door lock core brand. 8, c-level lock core top ten brands: new multi-xinduo Xinduoxin-class lock cylinder Zhejiang famous brand, the company mainly in research and development, design, production and logistics as one, is now rated as China's famous brand. 9, c-level lock core top ten brands: solid GULI Guli GULIc lock cylinder is a brand product produced by high-tech enterprises in Guangdong Province. The company has a strong qualification force and exquisite technology to produce the lock cylinder as the top ten brand. 10, c-level lock core top ten brands: Hongli Hongli c-level lock cylinder is a brand product produced by Zhejiang Hongli Lock Industry Co., Ltd. It is the only domestic anti-theft lock with its own development ability. The locks produced have won a number of national invention patents. Article summary: The above is for everyone to introduce the c-class lock core top ten brand recommended related content, I believe you look after the c-level lock core has a certain understanding, c-level lock core is a large number of lock core anti-theft function is good One is that the price is also relatively expensive, and friends in need suggest that they can understand and compare with the nearest local entity. Manhole covers are used to cover roads or deep wells in homes to prevent people or objects from falling. [1] According to material, it can be divided into metal Manhole Cover, high-strength fiber cement concrete manhole cover, resin manhole cover and so on. Generally round. Can be used in green belts, sidewalks, motorway, docks, alleys, etc. Manhole Cover Recessed Manhole Cover,Sewer Covers Drain Covers,Sewer Cover,Manhole Cover Sizes Jieyang Xinxin Industry and Trade Co., Ltd. , https://www.gdxxgm.com
Technical Parameters
Technical parameters Test load: heavy 400KN, general 250KN, light 125KN [1]
Bending strength: average 22MPa impact strength: average 10J / m2
Water absorption rate: 1%
Acid resistance: sample at 20%
Soak in sulfuric acid solution for 48h
No corrosion on the surface, 1% quality loss
Performance characteristics
1. High strength: Magnesite inspection has high compressive, bending and impact strength, and toughness. After long-term use, the product will not be crushed and damaged, which can completely prevent the "urban black hole" accident.
2. Beautiful appearance: The surface pattern design of magnesite inspection manhole cover is exquisite, the color is adjustable, and it can beautify the urban environment.
3. Easy to use and light weight: The product weighs only about one third of cast iron, which is convenient for transportation, installation and repair, which greatly reduces labor intensity.
4. Anti-theft: Magnesite inspection manhole cover has no recovery value and is natural anti-theft; according to customer requirements, a lock structure is provided to prevent theft of property in the well.
5. Strong weather resistance: Magnesite inspection manhole cover can be used normally in the environment of -50 ℃ ~ + 300 ℃ through scientific formula, advanced technology and perfect technical equipment.
6, acid and alkali resistance, corrosion resistance, wear resistance, rolling resistance of vehicles, long service life.
Distinguish by material
Can be divided into 4 categories
A. Metal manhole cover: cast iron, ductile iron, bronze manhole cover, etc .;
B. High-strength steel fiber cement concrete manhole cover (cement-based composite material);
C. Recycled resin manhole cover (recycled resin-based composite material);
D. Polymer-based composite inspection manhole covers, etc.
Differentiate by shape
Generally divided into circular and square.
In terms of road management in urban areas, a circular shape is generally adopted because the circular manhole cover is not easy to tilt, which can better protect the safety of pedestrians and vehicles.
Squares are generally used in rural areas and cable wells to better prevent the ingress of liquids such as rainwater.