他十六岁就从事药学.He just was engaged in the pharmacy 16 years old.采购产品手工的压克力的产品, 相片框架, 药学的礼物, 纸重量, 颁发, 卡片烛台.Handmade Acrylic Products, Photo Frames, Pharmaceutical Gifts, Paper Weight, Award, Card Holder.它是融 纳米 技术 、 光技术净化、触酶(催化...
你能用拉削技术制作齿轮 吗 ?A : Can you use broaching to make a gear?注意: 在进入拉削时一定要关闭放气开关.Notice: When broaching, make sure that the air escape cock is closed.其中计算所得到的拉削力, 必须小于拉床的实际拉力.Which has been calculated Broaching, and must be l...