?滴油润滑法
... 滴油润滑 drip feed lubrication; drip lubrication; drop lubrication; drop-feed oiling; oil drifeed 滴油润滑法 drip lubrication; drop lubrication; lubrication drip 滴油润滑器 drip feed lubricator; drip lubricator; drip-feed lubricator; drop feed lubricator; drop lubricator; external drip feed ...