何谓战机的转换性?
用固相含量仪测得的海水加重泥浆的固相体积是()含量。 ["般土和钻屑;","钻屑和重晶石;","般土、重晶石和盐;","般土、重晶石、盐和钻屑。"]
B6065牛头刨床最大刨削长度是:()。 ["600mm","630mm","650mm","670Mm"]
B6065牛头刨床刀架最大升降距离是:()。 ["150mm","165mm","175mm","180mm"]
CA6140型卧式车床最大车削工件回转直径为:()。 ["200mm","210mm","220mm","230mm"]
试述倒垂孔钻进的防斜措施。