Actually, this is my brother. Let me give you some advice. No matter what equipment you use, it is not absolutely safe. First of all, you must be professional and familiar with the ins and outs of what you do. Second, the operation standard, the usual safety inspection, safety education, operating procedures should be in place. Staff education must be organized on time, including basic knowledge related to this major, such as fire drills and equipment operation. Third, as a boss, don't be a shopkeeper who cuts and cuts. The probability of an accident will be very small. Do what you like with a sincere heart and God will arrange it for you.