本文对林用门式起重机型式、基本参数和工作级别标准的制订进行了分析和论证。
The paper analyzed and demonstrated the types, basic parameters, working grades of gantry crane and the forms of the new standard of gantry crane in forestry.
在进行经济技术性分析后，最终确定风机的设计方案，进而确定通风机适当的级型式、叶轮尺寸、轮毂比、转速和叶片数等基本参数。
Final design scheme is confirmed after economic and technical analyse. Then, axial fan 's stage type, impeller diameter, hub ratio , specific speed and the number of blades are decided.
YS- 1000型活塞式压力计的基本参数包括：精度等级、测量范围、活塞有效面积、活塞底盘及其连接件和专用砝码质量、接口型式等参数。
YS-1000 piston pressure gauge specifications include: accuracy class, range, piston area, piston chassis and connectors, special weights, interface thread and so on.
YS- 1000型活塞式压力计的基本参数包括：精度等级、测量范围、活塞有效面积、活塞底盘及其连接件和专用砝码质量、接口型式等参数。
YS-1000 piston pressure gauge specifications include: accuracy class, range, piston area, piston chassis and connectors, special weights, interface thread and so on.
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