C,. Incomplete fusion prevent adopting greater welding current, use correctly to weld the cleaning of operating, notice groove position.
未熔合的防止采用较大的焊接电流，正确地进行施焊操作，注意坡口部位的清洁。
Knowledge concerning all the processes operating in land treatment facilities is incomplete.
关于土地处理设备的所有操作步骤的信息并不完整。
Knowledge concerning all the processes operating in land treatment facilities is incomplete.
关于土地处理设备的所有操作步骤的信息并不完整。
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