In contrast , densimeter while drilling can overcome those defects by getting continuous and objective data.而随钻密度仪则能够有效地克服以上缺陷,其数据连续可靠,客观性也非常强.Reliability is poor and precision is not high while using traditional differe...
Right now, Hockaday's prototypes put out only a few milli - watts of power.现在, 霍克蒂的燃料电池原型只能输出几毫瓦的电力.Industrial designers sketch and create rough prototypes from foam board and other materials.工业设计者会拟出草图,用泡沫板和其他材料创建出...