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labile nitrocellulose
释义
labile nitrocellulose
不稳定硝化棉
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portable respiration aiding machine
portable retort
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portable riveting machine
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portable roller conveyer
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portable router
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portable sampler
portable sand conditioning unit
portable saw
portable saw mill
portable sawmill
portable scale
portable scaler
portable scraper
portable screen
portable screening plant
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portable seismographs
portable set
portable shunt
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