Pull-out force study of tube-to-tubesheet joints in heat exchangers;

The correlative study of detecting depths of arteries with transcranial doppler and head circumference in children;

Conclusion Head circumference and intelligence develo.

According to the theory of similarity, a physical simulation experimental research on the deck barge cargo compartment coaming movable gate through sand load has been carried out in this paper, and a physical simulation experimental model is set up.

Experimental simulation of drilling impact of coal sample in three-axle enclosed pressure;