coal chute cover

• 煤筒盖

coal chute cover的用法和样例：

例句

1. Detailed data show that all the four schemes are feasible, yet the last named scheme keeps the opened cover intact and makes it fly along the expected direction.
   经试验验证，各向异性材料的发射筒盖方案能按预先期望的方向整体飞出。