Leaded brass bar for making needle seat of syringe 铅黄铜针座棒
2.
Another group carried little brass bars which were not magnetic 另一组鸽子则缚着没有磁性的小黄铜棒。
3.
The pipe on which the hand will be riveted is machined from 3 - meter long brass bars using a computerized numerical control machine 将制作成型的指针黏在圆盘上，然后用机器进行连续两次的钻石抛光工序。
