heat tracing的用法和樣例：
例句
- This trap is suitable for low temperature accompanying heat line pipe and working condition which needs low temperature to discharge frozen water.
該閥適用於低溫伴熱管線和需要低溫排除凝結水的工況。 - The discharge line shall be heat traced when the PSV handles viscous materials or other materials that can solidify as they cool to ambient temperature.
如果壓力安全閥處理粘性介質或其它可能凝固的介質，因介質遇到環境溫度會發生凝固，所以排放管線應安裝伴熱管。
