国产亚洲精品无码不卡 |无码国产伦精品一区二区三|日韩精品无码一区二区三区久久久|亚洲中文无码日韩av

Solenoid Valve vacuum pipe

Used in automobile engine exhaust system on the connection of the nylon tube location is set to match the rubber hose, there are two small pier section, by a raised design ensures that the pipeline sealing, improve the production efficiency.