機器
armor
bank
banking
box
business
cash
chest
closeup
code
combination
credit
deposit
dial
digit
finance
financial
heavy
investment
iron
keeping
key
lock
massive
metal
money
ninety
number
numeral
open
pin
protect
protection
rough
round
safe
safeguarding
safety
secure
security
sign
steel
storage
strongbox
surface
treasure
treasury
vault