急性机械性小肠梗阻
Acute mechanical small intestinal obstruction
催化剂活性安定性
catalyst activity stability
航向中性安定性
neutral heading stability
JIS G3314镀热浸铝片的机械性能
Mechanical Properties of JIS G 3314 Hot-Dip Aluminum-coated Sheets and Coils
保护性机械通气
Protective lung ventilation
材料化学成份和机械性能
Material chemical analysis and mechanical capacity
材料机械性能
life test
material mechanical performance