而曲轴,在齿轮箱挂挡时, 又使汽车持续运动.When the gears are engaged, the crankshaft keeps the car moving.但是风力发电机的齿轮箱存在着经常在刹车时受冲击载荷而过早损坏的问题.The gear box of wind - driven generator is premature damage by impact load.对于电机操作机构,齿轮箱配置标准安装法兰.For ...
经过透析和冷冻干燥 、 可用免疫学方法测算.After dialysis and lyophilization , it can be detected by immunological methods.丘吉尔说过: “ 人类命运的好坏不能通过物质上的多寡来测算.Winston Churchill said that " the destiny of man is not measured by material computation...
Two kind of separated perforating and pulse fracturing composite charges are studied.论述了低渗油气层的地质特征;研究了两种分离式射孔脉冲压裂复合弹.Macroscopic deviations from isotropy occur due to bedding, schistosity and also sometimes fracturing.与各...