“水垢”造句

硬水使壶生水垢.
Hard water furs the kettle.

与金属不同, 塑料不会生锈、生水垢或凹陷,实际上塑料使用寿命更长.
Unlike metal, plastics never rust, scale , or pit - they virtually last forever.

输水、注水管线: 清除水垢、沉积物.
Water delivery and injection line: cleanup scale and sediment.