... 耐腐通径Anticorrosion 普通通径Normal Diameter 测量 范围 Measure Range ...
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... fw新鲜水plw污水ptw饮用水 normal diameter公称直径 fg燃料气 ...
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Mean normal diameter pitch 中点法向径节
Normal diameter d 公称通径
Diameter normal 正常直径
normal nozzle diameter 公称喷嘴口径
Drilling a 2 or 3 foot hole can be done with normal equipment, while drilling a ten, fifty, or one hundred foot diameter vertical hole would require an entirely new invention.
FORBES: Why Can't We Start Building The World's Deepest Building?
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