Slidac
滑線電阻調壓器
??? 情景例句
Grandpa helped me yesterday afternoon.
昨天下午祖父幫我的忙。
If you can guarantee on-time delivery with a penalty for late delivery, we can accept your sales price.
如果你能保證用懲罰延誤發貨方式準時發貨，你的銷售價我們可以接受。
What's up?
怎么了？