Five factors general rotatory compose design method is adopted for studying influence factors on erectness percentage seedling of naked root transplanting for transplanter, and the mathematical models between parameters of transplanting machine and erectness percentage seedling of are set up.

With a survey of his life story and the changing of his literary philosophy,the article is orientated towards the emotional features of his late lyric novels: sincerity,bluntness,rationality and humour.

The composition of town gas and properties given;analyzed was the new process for co-production of 50kt/a methane from excess town gas at the coal gas plant of Datong Coal Mines Group;by vertical retort and two-stage furnace for water-gas,coal gas produced,from which qualified methane can be produced by subsequent compression,conversion,de-carbonization,syntheses and distillation.

The paper reports that based on one dimention space heat conduction theory of infinite flat plate, the mathematic model on heat transfer of vertical retort is established.

Strength calculation of lifting lug on vertical vessel;