free recoil中文什么意思

自由后座力

• free:    adj. (freer; frees ...
• recoil:    n. 1.反跳，跳回，倒退；(枪的) ...
• free recoil travel:    自由后座行程

百科释义

Free recoil is a vernacular term or jargon for recoil energy of a firearm not supported from behind. Free recoil denotes the translational kinetic energy (Et) imparted to the shooter of a small arm when discharged and is expressed in joule (J) and foot-pound force (ft?lbf) for non-SI units of measure.