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Gasblase f
gen.	calotte de gaz; chapeau de gaz; poche de gaz
build.mat.	écaille f
earth.sc., energ.ind.	bulle de gaz; gisement de gaz
earth.sc., mech.eng.	bouchon de vapeur
met.	piqûre f; soufflure f
paleont.	pneumatophore m

Gasblase: 3 phrases in 2 subjects

Metallurgy	2
Transport	1