The author considers that to prevent the deformation and ensure the welding quality, to rationally determine the tapping location and avoid the holes upon the spiral seam is important.是什么意思_The author considers that to prevent the deformation and ensure the welding quality, to rationally determine the tapping location and avoid the holes upon the spiral seam is important.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句