Symmetry: When executing the tricks in the air the body should stay in a symmetrical position with the shoulders "t'd" off with the rest of the body.
对称：当在空中完成特殊动作时，身体要保持对称的姿势，肩膀和身体的其他部分呈“T”型。
The Machine consists of up-down stamped screen box, vibrator and shock absorber, 4-speed vibration-reducing metal spring connects body to base in symmetrical position.
本机由机体上下冲孔筛箱、振动源、机座及减震器三组部件构成，机体与机座连接由4档减震器金属弹簧对称定位。
The symmetrical barrel rollers position themselves freely on the concave outer ring raceway, which compensates for any shaft misalignment or flexing.
对称每桶辊位置上自由凹外圈滚道，使用户在任何轴偏心或展示。
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