In order to study the phase splitting characteristic of the gas-liquid two-phase mixture leaking out from a small break on the pipe wall, a special leaking experimental device was set up, and with an air-water two-phase flow loop, the experiments studying the phase splitting of leakage leaking through the break were carried out.

The Problems and Breakthroughs of Rejuvenating the Northeast Industrial Base;

The development of domestic plastics industry backward status, and the breakthrough of building our nation into a strong country of production IMM are in- troduced.

According to the national sales situation about large and medium buses in 2004,and through analysing the concentration degree of the producing and saling,the authors search a breakthrough about their enterprise′ s products development and sales.

Repair of intimal tear in descending aorta with felt patches in patients with acute type A dissection;