He showed his friends, and for his birthday he got pads and new roller blades!

过生日时，他又得到了一副护膝和一双新旱冰鞋。

Two boys in roller blades are pulled and pushed by younger ones at a park in Manila.

在马尼拉一座公园里，两名穿着直排轮的男孩被年幼孩童推拉着。

Pang Yingfeng sits patiently waiting to sell roller blades, but nobody enters her shop.

耐心地坐着等待小胖公司出售旱冰鞋，但是没有人进入她的商店。

In order to reduce vibration between roller pieces and saw blades on the process of sawing, we need reducing noises radiation.

为了减小轧件和锯片在锯切过程中的振动，降低噪声辐射。