Blocknut
保险螺帽, 防松螺帽
🗣️ 情景例句
how would you do it?
你怎么说？
He already has a phonograph,but he doesn't have a radio yet.
他已经有一架留声机，但是他还没有收音机。
My name is Ma Lili.
我叫马莉莉。