短語(yǔ)詞組短語(yǔ)boom cylinder drift test 動(dòng)臂油缸沉降試驗(yàn)boom cylinder drift 動(dòng)臂油缸沉降boom cylinder drift rate 動(dòng)臂油缸沉降速率three -boom drift-jumbo 三臂平巷鑿巖臺(tái)車 返回 boom drift