What is the gloss of the stone?

Abstract Stone is composed of various minerals. The composition of marble is relatively simple. It is mainly composed of calcite (CaCO3) and dolomite (MgCaCO3). Granite is much more complicated, so the luster of various minerals that.......

Ming Yang teach you to use the cylinder precautions

Antirust: After the cylinder is mounted on the body, if the piston rod is placed in the extended position, the exposed part of the piston rod must be coated with grease.
Speed: The general rules of the cylinder, when the speed exceeds 2m/s, its service life will be affected. When 0.3m/s is.......