Close the upper pipe ram 关上部钻杆闸板防喷器
Upper Pipe Rams 上闸板
upper nozzle pipe 上喷嘴管
upper steam extraction pipe 上部抽汽管
UPPER WASH PIPE LEFT 上部左侧清洗管
UPPER WASH PIPE RIGHT 上部右侧清洗管
Upper branch pipe 上叉管路
A novel water pipe, comprising a pipe wall and a tubular body with a pipe cavity, wherein the upper edge of the pipe wall (1) is axially provided with at least one groove (2).
一种新型水管，包括管壁和具有管内腔的管状体，其特征在于，所述的管壁(1)上沿轴向设有至少一条凹陷槽(2)。
Buried depth of rain water pipe should be buried in the frozen line, consideration should be given to the upper part of the load pipeline.
埋地雨水管的埋没深度应在冰冻线以下，应考虑管线上部的荷载。
Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover with hollow inside.
它是个上端为钻杆母扣或者由壬，下端为套管公扣，内空心的转换接头。
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