... bearing Wafangdian Bearing Corporation productsC, ring seals using high-grade2, barrel, screw A, screw form:gh production ... 90mm, screw L/D:20:1, screw materials and processing technology:CMnALA,nitrided quenched Nitriding depth: ≥ 0. ... force segment, auto cooling fan 3, electrical: A, control electrical appliances: Chint B, low-voltage electrical appliances: Chint C, temperature-controlled table ...