In album: Conical twin screw barrel
https://www.cjscrewbarrel.com/product/twin-screw-extruder/conical-twin-screw-extruder/ Screw straightness:0.015mm Tempering hardness:HB260-290 Nitride hardness:HV800-1050 Material:quality 38CrMoAIA, quality duplex stainless steel, Quality power metallurgy material Birthplace: Zhejiang Province, China (mainland)
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