Yongnuo ประกาศเลนส์ YN 85mm f/1.8R DF DSM AF mirrorless สำหรับ Canon RF mount อย่างเป็นทางการแล้ว ราคา $250
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Discover what is a rubber gasket, how it is made, and the sheet rubber products it is made from. Follow the gasket cutting process from start to finish. ... <看更多>