Hardware Encyclopedia: What are the several types of hardware locks?

1. Padlock: It is divided into copper padlock, iron padlock and password padlock. The main specifications are 15, 20, 25, 30, 40, 50, 60 and 75mm.

2. Bucket lock: It is divided into copper bucket lock, copper bucket lock, aluminum core bucket lock and left and right cabinet door lock. Its main specifications are φ22.5mm and 16mm.

3, marble door locks: divided into a single insurance door locks, double insurance door locks, three insurance door locks and multi-safety door locks, its main brands are Shanghai-made "bull" and "double dog", "horse card", " Harvest."

4, mortise locks: also known as anti-theft locks, divided into steel door mortise door locks and wooden door mortise locks, of which steel door mortise locks are: "Shenshi", "horse card" two major brands.

5, ball-type door locks: divided into copper ball locks and three-ball ball locks, as well as private room locks. The ball-type door locks are led by the “Gugli” and “Yale” brands produced by the Yale Solid Fast Locks Co., Ltd. in China.

6, color locks: divided into glass door locks, plug locks, button locks, electrical box switch locks and chain locks, cam locks and so on.

7, electronic control lock: magnetic card lock, IC card lock, password lock.

Silica Fume For Refractory Castables

The most widespread use of this kind of silica fume is to add in the fireproof castables, which is used to improve the physicochemical and construction properties of the refractory castables. The role of silica fume in refractory castables is mainly to enhance the filling and improve the workability. Moreover, the fluidity of the castables increases, and the bulk density is also increased. After adding silica fume into the refractory castables, the porosity decreases, while the strength is significantly improved. Other high temperature properties are also improved accordingly.

Silica fume about refractory, micro silica for refractory, silica ash about refractory

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