harder melt metal的用法和樣例：
例句
- The technique of forging stubborn metal has improved with new technologies.
新的技術(shù)改善了鑄造難熔金屬的工藝。 - The fusible plug device is a nonreclosing pressure relief device designed to function by the yielding or melting of a plug of fusible metal.
易熔塞裝置是一個(gè)非重閉減壓裝置，通過(guò)易熔金屬制成的塞子的變形或熔化發(fā)揮作用。
