THREAD
http://data.posccaesar.org/rdl/RDS492209
<http://rds.posccaesar.org/2008/02/OWL/ISO-15926-2_2003#ClassOfFeature>
2005.12.19
u20683
A feature that is a projecting helical rib of approximately triangular (or v), square, trapezoidal or rounded section, formed on a cylindrical or conical core.
RDS492209
THREAD
THREAD
Qualified