timber foot block

Based on the experience of long-term training,this article analyzs the function,the type and influencing factor of the split step of footwork in the tennis,and also makes further research on the necessary issue of footwork.

结合自己长期运动训练的实践经验,分析了在网球运动中分腿垫步的作用、类型及其影响因素,并对教学训练中掌握分腿垫步应注意的问题进行了深入研究。

The product's defect of kiln dirt and dust pollution can be easily caused due to the existence of contraction joints of SiC slab.

SiC棚板由于收缩缝的存在 ,烧制产品时容易落碴和被粉尘污染 ,同时火焰易窜过 ,而造成上层温度的波动和不均匀。