底板

qǐng bǎ zhǔ jī yí dào jī zuò hòu ān zhuāng hǎo dǐ bǎn

请把主机移到机座后，安装好底板。

Please move the main engine to the base and install the base plate.

dú pǐn cáng zài yī gè dài jiǎ dǐ bǎn de xíng li xiāng li

毒品藏在一个带假底板的行李箱里。

The drugs had been hidden in a suitcase with a false bottom.