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发布日期:2021年10月17日
pissjapantv日本偷窥pissjapantv日本偷窥,吧深一点老师今晚随你怎么弄av吧深一点老师今晚随你怎么弄av
Kobelco

The are welding process was first employed in Japan in 1914; though covered electrodes were mostly imported, leading shipyards and machinery fabricators were able to produce them for their own uses. Even Kobe Steel produced its own covered electrodes in-house. However, because of the poor quality of domestic welding consumables at that time, only imported consumables were specified for building heavy-duty ships. Later on, it became difficult to import industrial goods from overseas on account of deteriorating international trade

Flux Cored Wire- FCAW

Flux Cored Wire- FCAWpissjapantv日本偷窥pissjapantv日本偷窥,吧深一点老师今晚随你怎么弄av吧深一点老师今晚随你怎么弄av

TIG Rod-GTAW

TIG Rod-GTAW

Electrode – SMAW

Electrode – SMAW

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