DCHP-1 Online
trench ((n.)) [prob. < Cdn F < F tranche cold chisel] Fur Trade, Obs. 
n. Fur Trade, Obs. an ice-cutting tool. Also spelled tranch. [See picture at ice-chisel.]
See also: ice-chisel (and picture) trenching trenching-tool
trench ((n.)) [prob. < Cdn F < F tranche cold chisel] Fur Trade, Obs.
n. Fur Trade, Obs. an ice-cutting tool. Also spelled tranch. [See picture at ice-chisel.]
See also: ice-chisel (and picture) trenching trenching-tool