幹かん線せん結けつ合ごう器きMeaningsNoun1. trunk coupling unit; trunk connecting unit; TCUKanji used幹trunk線line結tied together合come together器instrumentComposed of幹かん線せんmain line; trunk lineNoun結けつ合ごうcombination; union; joining; linking; coupling; bond; join (in relational algebra)Noun器きdevice; instrument; vessel; container; ability; capacity; calibre; caliberNoun