IFC 4.3.2.20240904 (IFC4X3_ADD2) under development

6.1.8.16 PEnum_GullyType

6.1.8.16.1 Semantic definition

Type	Description
`BACKINLET`	Backinlet
`VERTICAL`	Vertical
`OTHER`	required category not on scale
`NOTKNOWN`	Value is unkown
`UNSET`	Value has not been specified

Table 6.1.8.16.A

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