Chopsticks for beginners come with a metal spring for easier use.

专为初学者设计的筷子，中间有弹簧夹，用起来更方便。

youdao

Plant is mainly used for metal screws, metal crafts factory, metal spring factory, electronics factory, toy factory, the watch factory and so on!

主要用于五金螺丝厂、五金工艺品厂、五金弹簧厂、电子厂、玩具厂、表业制造厂等！

youdao

A kind of whole plastic clothes-pin mold is introduced, for this clothes-pin, it needs no metal spring, with low manufacture cost and long using ages, also, the mold has a long working life.

介绍了一种全塑料的衣夹模具，该衣夹无需金属弹簧，生产该衣夹成本低又耐用，模具寿命长。

youdao

Massa was hit on the helmet by a metal spring, the size of a drink can and weighing almost a kilo, which fell off fellow Brazilian Rubens Barrichello's Brawn car.

BBC: Massa set to fly home to Brazil

Moreover, in many ways, it will do the job better than a metal balance spring.

ECONOMIST: A luxury watchmaker is putting silicon in its timepieces

Finally, this spring, he built a metal stall for two buffalo, single file.

WSJ: It's Easy to Be Cowed When Trying to Milk a Water Buffalo