Main Rail Clamp Types
* E Type Rail Clamp
Size:
Φ16: E1609,etc
Φ18:E1806,E1809,etc.
Φ20:E2007,E2009,E2055,E2056,E2063,etc.
Material: 60Si2Mn, etc
C:0.56-0.64, Mn:0.60-0.90, Si:1.60-2.00, Cr:≤0.35, P:≤0.03, S:≤0.03
Surface: Plain, painting, mechanical galvanized,etc.
* SKL Type Rail Clamp
Size: SKL1, SKL3, SKL12, SKL14
Material: 60Si2Mn, 38Si7, etc.
C:0.56-0.64, Mn:0.60-0.90, Si:1.60-2.00, Cr:≤0.35, P:≤0.03, S:≤0.03
C:0.35-0.42, Mn:0.50-0.80, Si:1.50-1.80, P:≤0.03, S:≤0.03
Surface: Plain, painting, mechanical galvanized,etc.
* D Type Rail Clamp
Material: 60Si2Mn, 38Si7, etc.
C:0.56-0.64, Mn:0.60-0.90, Si:1.60-2.00, Cr:≤0.35, P:≤0.03, S:≤0.03
C:0.35-0.42, Mn:0.50-0.80, Si:1.50-1.80, P:≤0.03, S:≤0.03
*KR Type Rail Clamp
Material: SPS9,SPS9A,etc
* Safelock Type Rail Clamp
Material: 60Si2Mn
C:0.56-0.64, Mn:0.60-0.90, Si:1.60-2.00, Cr:≤0.35, P:≤0.03, S:≤0.03
Surface: painting, etc.
*SB Type Rail Clamp
Material:38Si7, 60Si2CrA,etc
Standard:GB/T 1222, UNI 3545
Surface:Plain, painting, etc.
Testing facilities
* Special testing tools to test dimensions;
* Testing machines for testing the mechanical properties including:
Material test,
Hardness test,
Clamping force test,
Fatigue test,
Or at customers' request
Elastic Clip,Elastic Tension Clip,Elastic Tension Clamp,Spring Clip TAICANG ZHONGBO RAILWAY FASTENING CO., LTD. , https://www.railfastener.com
Surface: Plain, painting, etc.
Concentrated solution to crop topdressing problems
Mr. Guan from Songyuan City, Jilin Province: Is it possible to use compound fertilizer for a single application?
Answer: Yes, in two specific situations. First, if drought or water shortage forces one-time fertilization, you can use high-nitrogen and high-potassium compound fertilizer. It's best to choose a slow-release nitrogen fertilizer to ensure long-term nutrient supply. Second, if mechanized fertilization is available, apply the compound fertilizer at different soil depths before sowing. In this case, a high-nitrogen type compound fertilizer is recommended.
Mr. Lu from Haicheng, Liaoning Province asked: How should I apply corn-specific compound fertilizer with a ratio of 22:8:15 (N:P:K)?
Answer: This special fertilizer has a balanced nutrient distribution and is suitable for one-time application. However, if used as base fertilizer and then additional nitrogen is applied, the total nitrogen content may become too high. Therefore, under mechanized conditions, it’s recommended to apply 40–60 kg per acre before or during sowing. Of that, 1/5 should be placed in the top 10 cm of soil, and 4/5 in the 15–20 cm layer. If not using mechanized methods, apply 20–30 kg of the special fertilizer as base fertilizer, along with 5–10 kg of diammonium phosphate. Then, apply 15–20 kg of urea during the tasseling stage for better results.
Ms. Su from Shangqiu City, Henan Province asked: After applying urea in the greenhouse and watering it, the leaves turned yellow after 4–5 days. What could be the problem?
Answer: There are two possible reasons. One is that the water was applied immediately after fertilizing, causing the urea to leach down into deeper soil layers, leading to temporary nutrient deficiency. Urea needs 3–5 days for microbial conversion into ammonium nitrogen before it can be absorbed by plants. The second possibility is excessive irrigation, which washes the fertilizer beyond the root zone. To avoid this, try to avoid large amounts of water and fertilizer at the same time.
Mr. Sheng from Xiaogan City, Hubei Province asked: In local farming practices, people often apply potassium sulfate or sulfur-based compound fertilizer regardless of the crop. Is this a good approach?
Answer: Potassium chloride is the main source of potash and is suitable for most crops, especially in areas with frequent rain or irrigation. Potassium sulfate is mainly used for chlorine-sensitive crops like tobacco, onions, rapeseed, and berries. Using potassium sulfate indiscriminately can increase costs and cause soil issues, such as acidification or compaction due to sulfate buildup. It’s important to choose the right fertilizer based on crop needs and soil conditions.
(Senior Consultant of Sinofert, Professor Wang Xingren, China Agricultural University)
Farmers Daily
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