C CHANNEL 120X55 | UPN 120X55 WEIGHT #cchannel #steel #weight
Secret Angle Iron 90° Cutting Trick
1mm溶接について知っている人はほとんどいません
very few people know, the welder's trick is to make the weld stronger in thin metal | pipe cutting
few know the secret trick of welding galvanized square pipes | arc welding
この巻尺機能を知っている人はほとんどいません! 巻尺の隠された機能
few people know, how to weld strong joints on L angle iron | thin metal welder
beginner welder mistakes, secret technique of welding galvanized thin metal
not everyone knows about the technique of welding thin metal thickness of 0.7mm
質の悪い作業の溶接をやめます。 このテクニックしか知らない場合
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