valve cover
nắp xú páp
rocker box or rocker cover, valve cover /ô tô/
nắp dàn cò xú páp
valve box, valve clack, valve cover, valve cover plate, valve cutoff
nắp xuppap
cap of a valve, clack, flap, throttle valve, valve cap, valve clack, valve cover, valve cover plate, valve cutoff, valve flap, valve rotator
nắp van