at-the-opening (opening only) order

Opening-Closing-Opening Test

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

action force and reaction force

applied electromotive force {= applied EMF}; impressed electromotive force

Attractive Force and Spring Force Characteristics

Centripetal force and tangential force

equation of capillary force and buoyant force

force of-whist force stability

force-drive (or force-closed) cam mechanism

Input-force-output-force

linkage force binding force

mighty force and civilized force

SHEAR FORCE; SHEARING FORCE

the earth electric force and magnetic force

thermal force and hydrodynamic force calculation

unit conversion brake shoe(or brake pad)force(the ratio of conversion brake shoe force to mass)

[endoscopic]biopsy channel opening

2008 Beijing Olympic Ceremony Opening