heat-sealer

例句：

1. 1.The heat-sealer is used to seal the seams of fabrics.
   加热器用于缝纫布料的边缘。
2. 2. The machine has a built-in heater that keeps the work area warm.
   这台机器内置了加热器，保持工作区域温暖。
3. 3.The heat-sealer was designed to make sewing faster and easier.
   加热器的设计是为了使缝纫更快更易。