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Sperrvorrichtung f
gen.	blocking device
chem.	ratchet
commun., transp.	stopping device
glass	floater
met.	die assembly; die block
railw., sec.sys.	prohibition device
tech.	locking device; ratch; ratchet mechanism; stop
transp., mech.eng.	pawl; safety pawl
weap.	locking mechanism; ratchet gear

Sperrvorrichtung: 3 phrases in 2 subjects

Construction	2
General	1