at-the-opening (opening only) order

half built up crank shaft [= semi-built-up crank shaft

in-line slider-crank (or crank-slider) mechanism

slider-crank (or crank-slider) mechanism

Opening-Closing-Opening Test

reform and opening-up; reform and opening to the outside world

acute angle crank

adjustable crank

after crank

all-round crank motion

alternating band Crank-Nicolson scheme

alternating segment Crank-Nicolson difference sche

alternating segment Crank-Nicolson difference scheme

anti-parallel crank mecha-nism

arm of crank shaft

back-crank pumping unit

back-side-crank pumping unit

balance crank

band wheel crank screw