His hands are slightly higher than his waist, with the racquet head above his wrists and pointed back and up at 2 o 'clock.
他的手略微高于他的腰,他的拍头高于他的手腕并且向上指向2点钟的位置。
The Tee Seal USES two Nylon Back-Up Rings as anti-extrusion devices, allowing the Tee Seal to function under much higher pressures than a standard O-Ring.
在发球密封采用两个尼龙备份,作为抗挤压设备的戒指,让T恤印高得多的压力下功能比标准O形圈。
The strength of material that is ARB processed at ambient temperature is higher than that at 250~(o), but elongation is lower.
室温叠轧材料的强度要高于热叠轧的,而延伸率却低于热叠轧的;
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