该阀具有安装使用方便，动作灵活的特点。
The valve is characterized in that the installment and the use are convenient and the movement is flexible.
蜘蛛人的动作像猫一们灵活。
只有付出这样高的代价，才能保证晚会演出时动作灵活、跳跃自如。
The agility and bounds of the evening were insured only a price like this.
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