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Machine barrel and screw arbor of extrusion machine both adopt quality alloy steel, with nitriding and fine machining.
挤出机的机筒、螺杆均采用优质合金钢，经氮化和精密加工。
youdao
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Machine barrel and screw arbor of extrusion machine both adopt quality alloy steel, with nitriding and fine machining.
挤出机的机筒、螺杆均采用优质合金钢，经氮化和精密加工。
youdao