It is feasible to forecast the casting UTS by measuring DAS, but the effect of hole ratio on UTS should not be neglected.
通过测定二次枝晶间距来预测铸件的抗拉性能是可行的，但是孔洞率对抗拉强度的影响不可忽视。
Medium and deep hole casting blast sublevel open stoping method is suggested and its suitability to the stope ground pressure is expounded.
提出了中深孔抛掷爆破分段空场法，并阐明其对采场地压的适应性。
Compared with the traditional methods, such as embedded fixation, hole casting, bolt connection and welding, Haihang nail fastening technology has many advantages.
海行射钉紧固技术与传统的预埋固定，打洞浇注，螺栓连接及焊接等方法相比，具有许多优越性。
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