| 接口 | 说明 |
|---|---|
| IfcAxis2Placement |
This select type collects together both versions of the placement
as used in two dimensional or in three dimensional Cartesian space.
|
| IfcTrimmingSelect |
This select type identifies the two possible ways of trimming a parametric curve; by a Cartesian point on the curve,
or by a REAL number defining a parameter value within the parametric range of the curve.
|
| IfcVectorOrDirection |
This type is used to identify the types of entity which can participate in vector computations.
|
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