resin cored solder

例句：

1. 1. The electronic components were carefully assembled using a resin cored solder.
   电子元件被仔细地使用一种树脂填充的焊料组装。
2. 2. The new design incorporates a resin cored solder for improved durability and flexibility.
   新设计采用了一种树脂填充的焊料，以提高耐用性和灵活性。
3. 3. The use of resin cored solder in the manufacturing process has significantly reduced waste and improved efficiency.
   在制造过程中使用树脂填充的焊料显著减少了浪费并提高了效率。