Security service guard room保安部门卫室
security control guard保安护卫员
security y guard保安
Security Patrol Guard巡逻警卫
security and guard technology安防技术
Security Guard Handbook保安手册;保安人员执行手册
The security guard保镖;保安
Security Guard management保安管理
Senior Security Guard高级保安员;资深保安员
N-COUNT（可数名词） A security guard is someone whose job is to protect a building or to collect and deliver large amounts of money. 保安人员