哪 | nǎ | how; which |
na | (particle equivalent to 啊 after noun ending in -n) | |
něi | which? (interrogative, followed by classifier or numeral-classifier) | |
有 | yǒu | to have; there is; there are; to exist; to be |
用 | yòng | to use; to employ; to have to; to eat or drink; expense or outlay; usefulness; hence; therefore |
加固 | jiā gù | to reinforce (a structure); to strengthen |