发布网友
共1个回答
热心网友
ASTM F21 Standard Consumer Safety Specification For Recreational Powered Scooters And Pocket Bikes
休闲机动滑板车和便携式自行车的消费者安全规范
ASTM:美国材料与试验协会(American Society for Testing and Materials,ASTM)标准。
热心网友
ASTM F21 Standard Consumer Safety Specification For Recreational Powered Scooters And Pocket Bikes
休闲机动滑板车和便携式自行车的消费者安全规范
ASTM:美国材料与试验协会(American Society for Testing and Materials,ASTM)标准。