英文關鍵字
engineer
measures
voltage
electrical
adjustment
medical
household
equipment
professional
activity
industry
instrument
measurement
multimeter
technology
current
electrician
energy
device
measure
tool
conductors
danger
contractor
energetics
expert
job
maintenance
measuring
technician
testing
worker
automation
test
volt
voltmeter
electric
meter
digital
indication
power
risk
industrial
chip
engineering
appliance
repair