The word "maintenance" is a man-made word that does not conform to the grammatical wording standards. The original meaning of the word "maintenance" mostly refers to maintenance. In fact, "repair and maintenance" is taken out of context.
"Maintenance" generally refers to a maintenance contract signed between the maintenance party and the other party signing the contract.
Pinyin: wéi bǎo?
Sentence:
1. We can maintain up to five stations a day, but they patrol ten stations a day, or even Twenty units.
2. The preliminary result of the accident investigation is that a maintenance personnel of the maintenance company violated regulations during the maintenance process, causing a fatal accident.
3. Installation, repair and maintenance of freight elevators and passenger elevators.
4. The maintenance branches set up by some foreign companies in Hangzhou are very small and have no extra start-up capital, so they hire some workers without employment certificates at low prices to do it.
5. Instruct users in the selection, maintenance and use of measuring equipment.