Assertion: valve's thread | /r/HasProperty | formed on the cylindrical portion 24a
Facets:
Source sentences:
text: ln the embodiment' 10a of Fig. 4, a modified valve relief structure is illustrated in which the valve pressure is adjusted by threading the hood structure 21a on the hood base 25a through the complementally formed threads 32 formed on the cylindrical portion 24a and base 25a.