采用高速摄影法和电极触点法，对干砂消失模铸造金属液的充填形态进行了初步研究。
The pilot study was done on the filling shape of liquid metal in lost foam process with dry sand by using rapid photography method and contact time method.
钢筋骨架网衬砌模注砼及初期锚喷砼支护，采用水泥裹砂半湿式喷砼法；
The re bar net preliminary lining mould shotcrete and preliminary and anchor shotcrete are used for support by the use of the semi wet spraying method with sand entrapped in cement.
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