... oxyhydrogen welding氢氧焊; 氢氧焰焊接 on welded vessels在焊接容器上 openings through or near welded joints通过或靠近焊缝处的开孔 ...
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Limitation on welded vessels 焊接容器的限制
limitations on welded vessels 焊接容器的限制
s on welded vessels 焊接容器的限制
Limit on welded vessels 焊接容器的限制
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