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bit burnt
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理学
孔内事故
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bit burnt
烧钻
在钻进过程中,由于循环系统发生故障,在高速回转时产生高热,钻头与岩心、岩粉烧结在一起的事故。属孔内事故。
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grassland soil resource
grassland songbird
grassland state-transition model
grassland system engineering
grassland tea-horse trade
grassland terrestores
grassland tourism
grassland type
grassland type of south American
grassland UAV monitoring
grassland use right
grassland usufructuary right
grassland utilization
grassland waders
grassland water balance
grassland water consumption
grassland water cycle
grassland water resources
grassland water resources assessment
grassland water saving irrigation
grassland weeds
grassland wildlife
grassland with abundant water resource
grassleaf sweetflag rhizome
grass-livestock interaction
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