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选材
将原木或原条按树种、材种、规格和等级的一部或全部进行分类的作业,又称品等区分。选材有利于木材的贮存、保管、运输和利用木材,是森林采伐运输生产中的主要工序之一。
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steam turbine protection system
steam turbine rotor
steam turbine seal
steam turbine shaft seal
steam turbine sliding key system
steam turbine speed governor
steam turbine stage
steam turbine thermal power system
steam turbine water impact
steam turbine wheel
steam turbogenerator failure
steam-water separation,vapor-liquid separation
steam-water separator
Steange Phenomena Witnessed within Twenty Years
stearic acid
stearin
stearin; tristearin
stearyl alcohol
steatite
steatocystoma multiplex
Stebbins crater
Stebbins-Whitford photometry
Stebbins-Whitford system
STEC
Stechcol
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更新时间:2026/7/15 20:50:48