The first word is 挂号 (guà hào) which means ‘to sign in’. Let’s look at each character of this word, 挂 means ‘to hang’ and 号 means ‘number’. A way of using it in a sentence is: 你要先挂号才可以看医生。(Nǐ yào xiān guàhào cái kěyǐ kàn yīshēng.) You have to sign in first before you see a doctor.
医务 (yī wù) Emergency
Another word we can create related to 医务 (yī wù) is 急诊 (jí zhěn). This means an 'emergency'. A way of using it in a sentence is 急诊室在哪里？ (Jízhěn shì zài nǎlǐ?) Where is the emergency room?
救护车 (jiùhù chē) Ambulance
Finally, we can create the word 救护车 (Jiùhù chē) which means ‘ambulance’. A way of using it in a sentence is 快叫救护车！(Kuài jiào jiùhù chē!) Call the ambulance quickly!