指出必须严格按照统一的、规范的方法进行试验，才能使各种工厂化育秧设备的性能指标具有可比性。
It pointed out that we must obey a uniform and normative method to do the test to make the performance indexes of various factory seedling facilities comparable.
摄影(光学)。照相机取景器。定义和术语，试验规程，性能规范。
Photography (Optics) - Camera Viewfinders - Performance Specifications, Test Procedures, Definitions and Terms.
通过对超硬铝合金7175T74的试验研究，给出了7175T74合金的锻造工艺参数。 依此工艺生产的锻件其性能达到美国宇航材料规范AMS4149A规定的技术指标。
By experimental research on the superhard aluminum alloy 7175T74, the parameters of forging process of 7175T74 are given, which achieve the mechanical property of the of U. S. 'AMS4149A.
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