国产欧美一区二区三精品,欧美人与性口牲k配视2,狗爷城中村嫖妓,国产成年美女毛片80s

The split type hydroviscous coupling cable reel is specially developed and designed for the construction machinery reel with high current demand. Compared with the liquid-viscous coupling type, on the basis of retaining the liquid-viscous transmission structure, the output torque is more than 3 times that of it, and the current can reach 600A per ring. It is suitable for high-power construction machinery such as rock drilling rigs.