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In this paper the design, construction and check out of the vacuum line are presented.
介绍了真空排水系统的设计、施工及验收等有关注意事项。
youdao
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Complete line of ultrasonic, band, vacuum and bag sealers.
另有超声波，真空袋封口机。
youdao
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Complete line of ultrasonic, band, vacuum and bag sealers.
另有超声波，真空袋封口机。
youdao