Do not walk under any pipe resting on the V-door ramp.
不允许在放有钻杆的大门坡道下边通行。
By surrounding a gas-tight, pattented V-Seal with two compressed knitted wire mesh air gap spacers, the connection is made by simply sliding one section of pipe over another.
气密的V形密封器，两个压缩的编织金属网布气隙间隔器，略过管的一部分滑向另一部分。
Do not slide down pipe, rotary hose, V-door ramp, or cables. Do not ride with the cat-line or air hoist.
不答应从钻杆、水龙带、大门坡道、电缆、锚头绳或气动绞车绳索上往下滑。
Winch operator must ensure that the last joint laid down is no longer on the catwalk and that the catwalk is clear of personnel before slowly lowering the pipe out of the V-door.
气动绞车操作者在慢放钻杆出大门坡道前，要确认猫道上没有钻具和人员。
This thesis analyzes about it, then finds out a method of calculating pipe diameter in the low-pressure or v...
本文就这个问题进行了分析，以找出在低压状态(或真空状态)下计算管径的方法。
This thesis analyzes about it, then finds out a method of calculating pipe diameter in the low-pressure or v...
本文就这个问题进行了分析，以找出在低压状态(或真空状态)下计算管径的方法。
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