The paper summarized the geological cognition of the fomer reseachers on the ore-controlling structure,orebody occurrence characteristics and deep part ore prospecting perspective of the Maomaochang-Zhazichang lead-zinc deposit in Northwestern Guizhou.

Applying the advanced management thought and technology of value engineering, the author of the thesis studies innovative problem of product line of traditional machine pressed sesame and found out a fire-new method of selecting machines to product line and then provides a scientific basis for correct decision-making of enterprise.

In oil-extracting handicraft,the new mechanical factories gradually emerged and developed in some areas,but the manual operations still were main ways in their parts of work.