1. 现役军人：超级联赛 super league | 现役军人 serviceman | 品牌店 designer-label store

2. 维修人员：servicemain 给水总管 | serviceman 维修人员 | servicemanual 使用条例

3. 井口工：servicemain 支线 | serviceman 井口工 | servicemanual 维护手册

1. 男军人
A serviceman is a man who is in the army, navy, or air force.

noun

1. someone who serves in the armed forces
a member of a military force

e.g. two men stood sentry duty

Synonym: military manmanmilitary personnel