lead survey plug

• 铅熔塞

lead survey plug的用法和样例：

例句

1. The fusible plug device is a nonreclosing pressure relief device designed to function by the yielding or melting of a plug of fusible metal.
   易熔塞装置是一个非重闭减压装置，通过易熔金属制成的塞子的变形或熔化发挥作用。