定时信管

timed detonator

to set / to fix / to determine / to decide / to order

to fix a time / fixed time / timed (of explosive etc)

old variant of 時|时[shi2]

o'clock / time / when / hour / season / period

letter / mail / CL:封[feng1] / to trust / to believe / to profess faith in / truthful / confidence / trust / at will / at random

a fuse (for explosive charge) / detonator

variant of 管[guan3]

surname Guan

to take care (of) / to control / to manage / to be in charge of / to look after / to run / to care about / tube / pipe / woodwind / classifier for tube-shaped objects / particle similar to 把[ba3] in 管...叫 constructions / writing brush / (coll.) to / towards