91AV成人导航,伊人狼人影院,操逼精品一,中国一级AV片,黄色毛片一区

In 46 # guide rail oil, can choose 68 # rail oil when the weather is hot, when the day is cold, can choose 32 # rail oil. Guide oil is a guide for lubricating oil, also called (guide rail hydraulic oil) are commonly used in high carbon steel material, and bearing steel quality, and the mechanical equipment accessories, can reduce the mechanical loss and friction between, have anticorrosive, anti-oxidation, lubrication, adhesion effect. Around the rail oil suitable for itself or with the guide of the mechanical equipment. Rail oil is also suitable for the circulation lubrication of bearings and gears and other parts. Rail oil emulsification resistance, has been particularly good.