id	domain	url
cet-14694	www.cetjournal.it	www.cetjournal.it
cet-14694	www.swagelok.com	https://www.swagelok.com/en/engineering-services/design-assembly
cet-14694	www.ballard.com	https://www.ballard.com/about-ballard/publication_library/productspecification-sheets/fcgen1020-spec-sheet
cet-14694	www.swagelok.com	https://www.swagelok.com/en/blog/industrialfluid-system-safety-checklist
cet-14694	americanhistory.si.edu	https://americanhistory.si.edu/fuelcells/pem/pemmain.htm