The paper discusses Lw and Ls of TVOC from solvent tank,factors which effect Lw and Ls and measures to reduce them.

Experimental Study on the Flow Conductivity of a new typed resin-coated sand proppants;

Development of a high-strength acid-resisting proppant;

Measurement and analysis of proppant sphericity and roundness;

This paper introduces calculation contents of concrete container support bent in concrete batching plant,employs the design method of probability limit state,combines design example,describes the specific procedures of design calculation,has the versatility for similar design.