From the comparison of project,the choice and usage of the additive material,depositing and curing of concrete and thorough construction control,etc,the author introduces the usage of a new additive and the way to make concrete have anti-permeability and moderate expansion that can resist the contraction join

Several methods of developing high energy solid propellants were put forward,such as by using energetic binders or high energy density materials,or energetic plasticizers,or new-concept fuel additives,etc.

Preliminary study on extraction technique of a new food additive natamycin;

The present conditions of fresh—wetted instant noodles and fresh —wetted rice line are analysed,food additives in fresh—wetted instant noodles and fresh —wetted rice line are introduced,the application of new food additives in fresh —wetted instant food is putted forward.