In addition, the use of U3751 battery in operation, only five minutes of preheating, suitable for outdoor and field test.
?另外，U 3751在操作时使用电池，只需五分钟预热，适用于户外和场地测试。
2
The results show that, in the multi-track cladding process, the temperature field ellipse leans to the formed cladding, the front cladding has preheating function to the following cladding.
多道熔覆前面道次的熔覆相当于对后续的熔覆有预热作用；
3
Our company can supply many types of complete set of workover drilling RIGS whose motors are equipped with winter preheating device, suits high and low temperature with sandy climate of oil field.