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gancho de seguridad
coal.	detaching hook; safety detaching hook
lab.law., mech.eng.	roller catch; trip latch
mech.eng.	hook with safety toggle; clevis; safety hook
tech.	mousing hook; pintle hook
transp., mech.eng.	safety pawl

gancho de seguridad: 5 phrases in 3 subjects

Coal	2
Mechanic engineering	2
Technology	1