旋挖钻机钻杆键条焊接接头的残余应力
赵海燕
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, 徐兴全
1
, 于兴哲
2
, 朱小武
3
Residual welding stresses in the pipe-bar joints of a rotary drilling rig
Haiyan ZHAO
1
, Xingquan XU
1
, Xingzhe YU
2
, Xiaowu ZHU
3