经改良的铬钒阀弹簧级钢丝: standard specification for steel wire modified chromium vanadium valve spring quality
车辆: vehicle; car; rolling stock; tram; seater; carriage 短语和例子来往车辆 traffic; 铁路机车及车辆 rolling stock; 重型车辆 heavy vehicles; 军用车辆 army vehicles; 私人车辆 personal cars; privately owned cars; 禁止车辆通行。 no
