circumferential welding 中文意思是什麼
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Girth welding circumferential
環縫焊接 -
Development of local vacuum electron beam welding machine for flange circumferential weld
法蘭環縫局部真空電子束焊機的研製 -
Edge preparation for welding ; matching of inside diameter for circumferential welds on seamless pipes
焊縫預加工.無縫管圓周焊縫內徑的配接
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