Centerline discharge pump casing s are not acceptable. The pump casing shall have an integrally cast hand hole supplied with a hand hole cover.是什么意思_Centerline discharge pump casing s are not acceptable. The pump casing shall have an integrally cast hand hole supplied with a hand hole cover.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句