To estimate the resistance of thrust correctly during the process of the culvert box jacking is one of the main factors to construct the project successfully.
箱涵推进中推进阻力估算正确与否是工程成败的关键因素之一。
Introduced the driving gear box for bi-directional twin screw extruder, the new thrust device can instead of the traditional thrust fit.
介绍了双向双螺杆挤出机用传动箱，新型止推装置可替代传统的止推包。
Introduced the driving gear box for bi-directional twin screw extruder, the new thrust device can instead of the traditional thrust fit.
介绍了双向双螺杆挤出机用传动箱，新型止推装置可替代传统的止推包。
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