Assertion: fixed platform | /r/ObjectUse | used for casemate
Facets:
value: in fortifications
type: LOCATION
Source sentences:
text: Fixed platforms are used for casemate and barbette batteries in fortifications, and are constructed with the works; siege-platforms for guns and howitzers; and siege-platforms for mortars; the other kinds are the rail-platform, the ricochet-platform, and the platforms for sea-coast mortars.