半圆钳

half-pint

half exact contravariant functor【数】

half-mast

semielliptical【数】;half elliptical【数】

half log【木】;half-round wood【木】

half-mature forest【林】;middle age of stand【林】

either-way operation【通信】;half-duplex operation【通信】

half-hour rating【电】