The paper has chosen the anti-corrosion coating as the downhole tubing corrosion protection measure, screened four kinds of coating material to do with performance evaluation.

选择防腐蚀内涂层作为井下油管防腐蚀措施。筛选了四种涂层材料进行性能评价。

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Using coal gangue of Qitaihe as raw material, the best surface medication agent was screened through the test of medication choosing and rubber filling.

以七台河矿区煤矸石为原料，通过改性药剂选择试验和橡胶填充试验筛选最佳表面改性剂。

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The material surface image screened by a CCD camera was processed to calculate the level of material by a computer, and then to control the valve of material container.

由CCD摄像头拍摄容器内物料表面图象，经计算机处理后得到物位高度，进而控制物料容器的供料阀门。

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Dutch authorities have said they are confident about how AbdulMutallab was screened but acknowledge that they could not have detected the explosive material that he was said to be carrying.

CNN: Body scanners not 'magic technology' against terror