The front of the <e1>boom</e1> has a hinged "mounting" <e2>fitting</e2> which is placed into the opening in the mast for the boom and sail slugs.
The front of the
The front of the boom has a hinged "mounting" fitting which is placed into the opening in the mast for the boom and sail slugs.
<triplet> boom <subject> fitting <object> Component-Whole(e2,e1)