計數器

counter / register

surname Ji

to calculate / to compute / to count / to regard as important / to plan / ruse / meter / gauge

to count / reckoning

to count / to count as / to regard as / to enumerate (sb's shortcomings)

number / figure / several / CL:個|个[ge4]

frequently / repeatedly

device / tool / utensil / CL:臺|台[tai2]

Geiger counter