เชิงกล, เกียร์, โซ่, ฟันเฟือง, โซ่เครื่องยนต์, การส่งผ่าน, โซ่ส่งกำลัง, ชิ้นส่วน, โลหะ, เหล็ก, ประแจ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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