longitudinally welded

基本解釋

In this paper, several problems in the production and application of ERW longitudinally welded casing are discussed.
ERW直縫焊套管已在我國(guó)廣泛使用，本文結(jié)合生產(chǎn)及使用中發(fā)現(xiàn)的間題淺談幾點(diǎn)看法。
The rapid analysis method of welding quality, acid washing test, for the longitudinally high frequency welded pipe is introduced.
介紹了一種快速分析高頻直縫焊管焊接質(zhì)量的方法——酸洗試驗(yàn)。
Furthermore, to meet the needs from market, it is helpful to reconstruct the existing longitudinally welded tubing mill in our country.
為滿(mǎn)足市場(chǎng)對(duì)復(fù)合管的需求，對(duì)于我國(guó)直縫焊管機(jī)組改造有借鑒作用。