A.40~70B.90~100C.50~90D.100~120
A.粘度高的潤滑油B.粘度低的潤滑油C.原牌號(hào)潤滑油D.任何潤滑油
A.牌號(hào)B.品質(zhì)C.牌號(hào)和品質(zhì)D.無需檢查