The fluctuation of liquid steel's temperature in tundish of continuous-casting when producing 45# steel is researched,the influence actors analyzed,some improving measures proposed.

In order to reduce the inclusion quantity in the stainless steel slab, water-modeling experiment of stainless steel slab continuous casting tundish is launched.

The present paper introduces the principle of manually quick replaceable tundish nozzle and experiments and application of the technology in the billet continuous casters in Sanming Steel and the important role it has played in raising various index of the continuous casting dramtically.

The present situation of automatic small tube packing technic of our national industrial explosive production is presented and it is thought that secondary packing technic is one of chief technology for automatically packing.

Institutional economics analysis on the“Bribes”;