Do not use conventional pipe wrenches.
不要使用常规管道扳手。
Pipe wrenches should be inspected regularly. Replace the heel and jaw section if found to be defective or worn out.
应当定期检查管钳，更换已磨损或有伤痕的钳牙及牙床。
Pipe wrenches should be inspected regularly. Replace the heel and jaw section if found to be defective or worn out.
应当定期检查管钳，更换已磨损或有伤痕的钳牙及牙床。
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