substitutor

常见例句

• Test results show that it has the advantages of good insulation effect, long life, low cost and simple making process.It is the substitutor of import insulating sleeve and has widely applied prospect.
  验证结果表明:该冒口套具有保温效果好,寿命长,价廉,制作工艺简单,是进口冒口套的替代品,具有推广应用价值。
• exam substitutor
  “枪手”
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