High corrosion & abrasion resistance to prolong lifetime of screw and barrel Special alloy powders being sprayed and welded on the screw's ridge/flight,and use different alloy and welding methods for the screw of different functions. 7178788094934171783-blid-6851473755142467624

หวย 17/1/63 คอหวยส่องเลข " อ่างน้ำมนต์ฤาษีเณร " เห็นเลข 8 ลอยชัดเจน...

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