Move the high side hose to test cock #4, low side to test cock #3 and open both test cock #3 and test cock #4.是什么意思_Move the high side hose to test cock #4, low side to test cock #3 and open both test cock #3 and test cock #4.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句