This paper, through an analysis of several approaches, puts forward a best one to modernize the brake system of existing general purpose freight cars by using a wagon adjusting valve and high friction brake shoes.

Described are the structure features,function principles,installation and points for attention in operation of the three types of imported height adjustment valves.

Lowing the production cost of urea-formaldehyde resin adhesive by adjusting the technological conditions;

To adjust the structure of papermaking raw materials in China and rationally utilize non-wood fiber resources;

Weather warming effect to agriculture and ecologic environment and adjustment method of plants structure in Heilongjiang Province;

Analysis and Adjustment of Grinding Error of Curve Grinding Machining for KR950 Roll Grinders;

Assembly and adjustment of double-strike electric drive screw presses;

Discussion on the Influence of the Resources Product Import and Export Tax Rate Adjustment on the Coal Profession;