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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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pressure-state-response model
pressure steam sterilization devices
pressure suit
pressure swing absorption
pressure switch
pressure tank
pressure-temperature phase diagram
Pressure-Temperature-time path
pressure test
pressure test evaluation of oil and gas pipeline
pressure testing
pressuretightness
pressure transducer
pressure transmitter
pressure transmitting coefficient
pressure transmitting medium
pressure trough
pressure-type stage gauge
pressure type thermometer
pressure ulcer in older people
pressure vacuum valve
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pressure vessel explosion
pressure vessel self-enhancement process
pressure vessel structure
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