Up to now in many waterpower stations the telescopic joints of penstock have been abrogated because of water leaking.

 
  • 目前不少水電站因為管道漏水等問(wèn)題而取消伸縮節,在取消伸縮節時(shí)最后一條焊縫的焊接環(huán)境溫度選擇是非常重要的。
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