Weld-On 威得安 ; 威德安
weld-on type tool joint 焊接式钻杆接头
weld-on kelly 对焊方钻杆
weld-on drill pipe 对焊钻杆
weld-on drill collar 对焊钻铤
full weld-on pipe base screen 带中心管的全焊接筛管
weld-on tool joint 对焊钻杆接头
Weld on the 30 "bottom flange."
用气焊割掉30“隔水管。”
According to the elastic theory, this paper gives partition Law of stress and quantitative answers over the overlap joint weld on skirted support.
利用弹性理论,分析推证出了裙式支座搭接焊逢内的应力分布规律及其定量解答。
The investigation into the thermal cycles at different zones of a weld on HSLA steel with hardened tendency with aluminium silicate as thermal insulator are carried out completely.
对采用硅酸铝保温的淬硬倾向大的低合金高强度钢的焊接区域不同部位的焊接热循环进行了研究。
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