The reason is that the residence time, the radial distributions of linear velocity and temperature of fluids in the reactor affect the thickness of coke layer greatly, they acts as controlling facfors of production.

During the manufacturing process of two rows of large-spacing cold blast cupolas, such ways are used to tell if the cupola's coke bed height is suitable as observation of tuyere, hot iron, slag, fire color of the forehearth, air output and wind pressure.

Objective To explore the sequential imaging and pathological alternations of tumor vessels in patients with malignant solid tumors after extracorporeal treatment of high intensity focused ultrasound (HIFU).