Specimen可与sample换用,但常指人或物中选出的有代表性部分,或指供科研、化验或检验用的标本。 主要内容如下:分 析介绍了几种常见抽油泵的工作原理、构造 、 适用范围及分类. When I arrived to receive it back again the following early morning, I could not advise them off my arrival this time within the application. But I parked suitable in entrance on the large sidewalk all over again, went in ... https://realestateinvestmentingurgaon.blogspot.com/