英文關鍵字
assistance
black
business
businessman
button
call
calling
career
center
communicate
communication
company
concept
connection
contact
conversation
customer
device
dial
dialing
feedback
finger
handset
help
helpdesk
helpline
info
information
key
keypad
landline
male
marketing
number
operator
phone
problem
pushing
question
receiver
reception
service
solution
support
technology
telecommunication
telemarketing
telephone
workplace