draft hole 中文意思是什麼
draft hole
解釋
通風孔-
Spherical models, exponential models, gaussian models can be used to fit the semi - variogram. draft phenomena of available iron showed hole effect model
其變異函數可用球狀模型、指數模型、高斯模型擬合,有效鐵存在漂移現象,可用孔穴效應模型擬合。 -
And draft the on - the - spot experiment through the indoor experiment, every parameter of the lead impeller nozzle such as efflux pressure, target distance, attack time parameter to hole influence is analyzed
通過室內實驗和擬現場實驗,設計內導葉輪噴頭,分析內導葉輪噴頭各參數及射流壓力、靶距、打擊時間等參數對鉆孔作業的影響。
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