All butt, grooved t, and corner joints shall be complete joint penetration weld joints.
所有对接、T型槽和弯管接头都要完全侵入连接到焊接接头上。
He often treated his friends badly; butt t hey remained loyal tot he last.
他经常不善待朋友，但朋友们却始终对他忠心耿耿。
He often treated his friends badly; butt t hey remained loyal tot he last.
他经常不善待朋友，但朋友们却始终对他忠心耿耿。
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