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hand-operated spindle-wheel
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hand-operated spindle-wheel
Encyclopedia
理学
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hand-operated spindle-wheel
手摇纺车
通过手摇转动纺车绳轮,带动锭子旋转,利用旋转抽丝延长,将丝、毛、棉、麻等纤维原料制成纱或线的工艺装置。
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neutron porosity well logger
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neutron-proton ratio
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neutron radioassay instrument and equipment
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