(A)粘度 (B)耐高溫 (C)滴點(diǎn)
(A)手工加油 (B)滴油潤(rùn)滑 (C)飛濺潤(rùn)滑
(A)流動(dòng)性強(qiáng) (B)受溫度影響不大 (C)機(jī)械效率高