As more people play, the progressive jackpot increases even faster. Whose name will be at the top of the list?
随着越来越多的人玩，进步困境增加得更快。
As the increase of the pressure difference, the contact pressure increases, the contact pressure of iso-wall thickness progressive cavity pump is larger than that of common one.
随着压差的增加接触压力相应增加，等壁厚螺杆泵比普通螺杆泵接触压力大；
As the increase of the pressure difference, the contact pressure increases, the contact pressure of iso-wall thickness progressive cavity pump is larger than that of common one.
随着压差的增加接触压力相应增加，等壁厚螺杆泵比普通螺杆泵接触压力大；
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