top bearing shell

例句：

1. 1.The top bearing shell of the machine ismade of high-quality steel.
   这台机器的顶承载壳体是由优质钢材制成的。
2. 2. The engineer carefully inspected the topbearing shell before installation.
   工程师在安装前仔细检查了顶承载壳体。
3. 3. The topbearing shell was designed to withstand extremetemperatures and pressures.
   顶承载壳体被设计成能够承受极端温度和压力。