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目的评价布托啡诺超前镇痛对罗哌卡因臂丛阻滞效果的影响.
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Flashing butt welding between ferrite spheroidal graphite cast iron and 20 steel.
铁素体球墨铸铁与20钢的闪光对焊.
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It mainly attacks Picea jezoensis and causes a white rot of root and butt.
该病主要发生于成熟林分,造成干基特别是根部腐朽.
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