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Patents

Current position: Home >> Scientific Research >> Patents

一种无冻结器液氮人工地层冻结方法，201611205956.0

Release time:2022-04-03 Hits:

Service Invention or Not:  no

Pre One:一种液氮供液花管开孔直径确定方法，201611207275.8 Next One:基于采场应力状态的岩体稳定性评价方法，201611208171.9

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