The external heated singeing machine adopts the new type of double-slit radiant high-efficiency burner to heat the roller, fabrics pass through the hot surface of the roller for contact singeing.

This lecture chiefly described process condition of singeing, analyzed mechanisms of energy saving burner, recommended clean and energy saving burner and its device applied to old machine reform, expounded control program to singeing process conditions.

Discovery of a giant caldera in the Yingcheng Formation in the Xujiaweizi fault depression, northern Songliao basin;

Yandangshan caldera is one of the well developed resurgent caldera tectonics in Moshishan group in eastern Zhejiang provice.

he author studies the Xianglushan Mesozoic caldera as an example,and describes the genesis and evolution of the caldera in different aspects, such as the structure character,volcanic rock sequence and volcanic apparatus etc.

Researches in paleovolcanic geology and metallogeny to Zheyaoshan Cu-Zn deposit area of Baiyin Ore-field suggest that the area is a large paleovolcanic crater well-developed with a suite of erupted,erupt-flooded and flooded phases,volcanic stump,subvolcanic intrusions and extrusives as well as erupt-sedemantary phases.