ดอกกัดร่องตัวที ร่องตัววี ขนาด 16/20/25 มม. 60 90 สำหรับงานเชื่อมโลหะผสมแข็ง ดอกกัดคาร์ไบด์เชื่อม ด้ามตรง รูปตัวที

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