Assertion: slide fastener's pair | /r/HasProperty | 21 d
Facets:
Source sentences:
text: A pair of right and left pawl mounting portions 21 d, 21 d are integrally formed on the top face of the upper blade piece 21 between rear opposing faces of the front supporting walls 25 a such that they project upward adjacent both side edges of the pawl accommodating concave portion 21