单词：pump liner
pump liner的用法和样例：
例句
- The suitcase liner is a piece of soft cloth.箱子的衬里是一块很软的布。
- Where maintenance work includes the cutting into the liner of a column or vessel, care is necessary in case there is hazardous material trapped behind the liner.当维修作业包括切割进塔器或容器的衬里中时，则需注意衬里后面是否隐藏有危险物质。
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