婷婷五月天六月天|日韩成人高清视频|亚洲 中文 中出|一本国产欧美波多91东京热

EGR vacuum pipe

Applied in the exhaust gas recirculation line control system have the characteristics of high temperature resistant sealed performance is good, can introduce a suitable amount of exhaust gas in combustion in the cylinder, thereby reducing overall temperature of the cylinder, and to exhaust gas emission standards