risern.起床者；起义者；竖板；冒口riserlystyrene riser聚苯乙烯冒口实样Risers covering flux冒口覆盖剂riser knock-off ram打冒口锤riser lystyrene riser聚苯乙烯冒口实样riser-moored tanker立管系泊油轮riser with slip joint伸缩式隔水管Riser's localizer cast对流系统riserless mud recovery无隔水管钻井液回收riser staircase signal上升阶梯信号Riser and gating system铸造方案设计