钢管相贯焊接节点
welded joint of steel tubular members
焊接节点疲劳强度
fatigue strength of welded joints
梁柱焊接节点
beam-column welded joint
welded beam-to-column connection
双点点焊接头
Double-spot welded joints
铸钢件-钢管焊接节点
cast steel-tube welded joints
带中心管的全焊接筛管
full weld-on pipe base screen
全焊接板式换热器
All-welded plate heat exchanger