Grooving in the skirt of coke drum is able to lighten the stiffness impact on the skirt and reduce the thermal stress on its fillet weld.是什么意思_Grooving in the skirt of coke drum is able to lighten the stiffness impact on the skirt and reduce the thermal stress on its fillet weld.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句