Ensure that the correct grade of pipe is being picked up.
确认吊起的钻杆级别是细确的。
Standard construction includes the discharge pipe extending through the support plate above grade.
标准构造包括穿过支撑板的排水管。
Standard construction includes the discharge pipe extending through the support plate above grade.
标准构造包括穿过支撑板的排水管。
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