结果表明：我国优秀女子铅球运动员在滑步阶段，左腿有效摆动不足， 右腿蹬伸力量、速度不佳。
The result shows that the effective swinging of left leg is insufficient and extending strength of right leg is not good at the stage of sliding.
共混硫化胶的强伸性能较PB有很大提高，且仍能保持PB优良的抗湿滑性及低生热值。
The physicomechanical properties of vulcanizates of the blends are greatly enhanced, with the excellent wet skid resist…
应用推荐