The precautions of explosion -proof hand pulling gourds in the process of use are also explosion -proof hand -proofing gourds are also divided into levels. Where is the so -called level difference? The main reason is that in the configuration, the explosion -proof gourd is determined according to the environment. For example, the B -level explosion -proof hook, sprocket, is made of aluminum bronze, and other accessories are composed of copper plating. You can see that B -level explosion -proof is also called level 2 explosion -proof. It is mainly two major materials for aluminum bronze, and other accessories include heavy chains, all of which are copper plated. This will undoubtedly have a big difference in cost. If your The use environment is not very harsh, and the gourd using this level is also enough. Conversely, your environmental requirements are relatively harsh, and there are two other levels to choose from, that is, Class C is level 3, D -level, and level 4 explosion -proof. As for the specific selection issues, you can consult Ri Zhi and give you reasonable selection suggestions.