metalcase magnesite brick

例句：

1. 1. The engineerused a metal case to hold the boltin place.
   工程师用一个金属夹具来固定螺栓。
2. 2. The metal case is madeof high-quality steel and has beenheat-treated to increase its strength.
   这个金属夹具是用高质量的钢材制造的，经过热处理以提高其强度。
3. 3. The metalcase was designed to withstand heavy loadsand is widely used in construction projects.
   这个金属夹具被设计用来承受重载，并且在建筑项目中广泛使用。