ตัวกรองผลการค้นหา
opening
แปลว่ารู, ช่องเปิด
Backer (back-up plate)
แปลว่า(english) A “tool” or reinforcing part, which presses against the outer surface of an extrusion die, supporting it against the pressure of the extruding metal. The backer has an opening larger than the die aperture, allowing the extruded product to emerge without marring its soft surface.