Assertion: crane's boom | /r/MadeOf | a number of tubes
Facets:
Source sentences:
text: A telescopic crane has a boom that consists of a number of tubes fitted one inside the other.
text: The key feature that differentiates a telescopic crane from other conventional cranes is that it has a hollow boom which consists of several tubes fitted one adjacent to the other.
text: A telescopic crane has a boom that consists of a number of tubes fitted one inside the other.