cement gun是什么意思

用法例句

Study of gangue jet cement featured C_(11)A_7·CaF_2and C_4A_3;

矿相煤矸石C_(11)A_7·CaF_2和C_4A_3快硬喷射水泥的试验研究

In this paper,coal gangue is used as substitute of alum clay to prepare jet cement applied in mining and substructure work.

研究了用煤矸石代矾土配料制备矿山及地下工程用喷射水泥,该水泥含主要矿相C11A7·CaF2、C4A3S、C3S和少量矿相C2S。