How to install skirting skirting

Many people do not know what the baseboard is. The baseboard is literally explained as being installed on the wall. The foot can touch the place, not only can make our house decoration more beautiful, and our decoration style. It is uniform and it can also protect our walls from damage. So, how to---

30 basic concepts about polyurethane

1. Hydroxyl value: The amount of hydroxyl group (-OH) contained in 1 g of the Polymer polyol corresponds to the number of milligrams of KOH in units of mgKOH/g. 2. Equivalent: the average molecular weight of a functional group. 3, isocyanate content: the content of isocyanate in the molecule 4. I---