常見例句雙語例句After the cam lobe moves out from under the valve lifter, the valve spring forces the valve up onto its seat again.當(dāng)凸輪的凸角在凸輪挺桿下出現(xiàn)時(shí)，它推動凸輪挺桿向上運(yùn)動（離開凸輪軸）。 返回 valve spring lifter