safety-catch

n device that prevents the dangerous or accidental operation of a machine, etc, esp one that stops a gun being fired accidentally 安全制动装置; （尤指枪炮上的）保险栓: Is the safety-catch on? 保险栓拉上了吗?

safari, safari park, safari suit, safe, safe conduct, safe deposit (US ,safe deposit), safe house, safe seat, safeguard, safekeeping, safely, safety, safety curtain, safety glass, safety island (also `safety zone), safety lamp, safety match, safety net, safety razor, safety-belt, safety-pin, safety-valve, saffron, sag, saga, sagacious, sagaciously, sagacity, sage, sage-brush, sagely, Sagittarian, Sagittarius, sago, sahib, said, sail, sailboat, sailcloth, sailing,