roulette-like street gambling
Abbreviation of 伝助賭博. A historical street gambling game resembling roulette, now rare.
See also: 伝助賭博
It seems that 伝助 gambling was popular in the postwar black markets.
portable tape-recorder (used by reporters)
Colloquial term for a portable tape recorder, especially the kind used by newspaper reporters. Now largely historical.
Old-time newspaper reporters went to cover stories with a 伝助 slung over their shoulder.