... . pressure motor power: 7.5KW×2, 6 classb. One Level of worm gear and worm complementary: WS180 I=40, Center ... distance A=180mmc: Two Level of worm gear and worm complementary: Double enveloping worm gear ... electric contact pressure gauge, unloading device, relief valve, filter device, liquid level display, the system pressure to control grade functions.6. Processing ...