英文關鍵字
business
businessman
button
buttons
call
calling
closeup
communicate
communication
concept
conference
connection
desk
device
dialing
electronic
entrepreneur
equipment
hand
hands
hold
human
indoors
keypad
making
male
man
manager
number
office
operator
people
person
phone
pressing
professional
pushbutton
pushing
receiver
service
set
taking
talk
technology
telecommunications
telephone
worker
working
young