英文關鍵字
1080
battery
calibration
car
charge
checking
chip
circuit
computer
connection
device
digital
discharge
display
electrical
electrolyte
energy
engine
engineer
equipment
frequency
graphic
graticule
hand
hitech
industry
instrument
instrumentation
lab
laboratory
maintenance
male
man
measure
mechanic
meter
microchips
mode
monitor
rechargeable
service
station
technician
test
tool
voltage
voltmeter
volts