Assertion: mechanical anchor | /r/HasProperty | designed in 1930
Facets:
value: by the rawlplug company
type: OTHER
Source sentences:
text: The first mechanical anchor, the Rawlbolt, was designed in the 1930s by the Rawlplug company and the first fixing for hollow walls was the Toggle Bolt, which was also designed by Rawlplug in 1941.