引线

fuse (for an explosive device) / electrical lead / intermediary / catalyst / (dialect) sewing needle

to draw (e.g. a bow) / to pull / to stretch sth / to extend / to lengthen / to involve or implicate in / to attract / to lead / to guide / to leave / to provide evidence or justification for / old unit of distance equal to 10 丈[zhang4], one-thirtieth of a km or 33.33 meters

variant of 線|线[xian4]

thread / string / wire / line / CL:條|条[tiao2],股[gu3],根[gen1] / (after a number) tier (unofficial ranking of a Chinese city)

lit. to thread a needle (idiom); fig. to act as a go-between

to thread a needle / (fig.) to act as a go-between

a pull-through to thread a needle / fig. to act as go-between