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直升机集材
释义
直升机集材
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集材
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helicopter logging
直升机集材
在森林采运作业中,将各伐木地点伐倒的木材逐次逐根悬吊于直升机下面空运汇集到装车场(山上楞场、集运木材点)的集材作业。
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Emperor Gaozong of Southern Song Dynasty
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