... 3D design 4. double shot machine double injection mold, two shot mold, double injection molding, double color mold, plastic double injection mold, two ... They require the parts with LED diaphanous. 2. Improve handle feeling. Some handheld products, they require to use rubber ... comfortable. Such as interphone cover, electric power tool handle, spanner, toothbrush handle, thermos cup and so on.3. Make ...