Assertion: snorkel's portion | /r/HasAspect | semi-circular cross-section
Facets:
value: at the opening
type: TEMPORAL
Source sentences:
text: 2D, the bottom of cap 210 has an oval cross-section, with two large curved wall regions 210 a, 210 b. Since the upper portion 104 has semi-circular cross-section at the opening 105, one of the cap's curved wall 210 a is attached to the curved wall of upper portion 104 (see FIG.