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Gasblase f
gen.	blowhole; gas cap; gas-cap
build.mat.	shell
chem.	blister
construct.	gas porosity (Fehler in Gussstücken)
earth.sc., energ.ind.	gasfield; natural gas field
met.	pinhole; air hole; blow hole; gas hole; gas pocket; void; bubble
paleont.	basal cyst; float; pneumatocyst; pneumatophore
phys.	gaseous inclusion
refrig.	gas lock; vapour lock
tech.	gas bubble; gas-charged bladder

Gasblase: 3 phrases in 2 subjects

Metallurgy	2
Transport	1