a manual worker的用法和样例：
- A skilled manual worker;a craftsperson.
- Communication by means of a manual alphabet.
- 1.a fellow worker; 2.an office boy; a manual worker (such as janitor, cleaner, etc.)
- Did you want an automatic or a manual transmission?
- It is a well-known fact that white-collar workers are not nearly so well organized or unionized as the manual workers.