1.   A turnbuckle is a steel sleeve with a central slot and a threaded hole at either end.

2.   Officers could have cut through the steel sleeves joining the protesters with a Makita grinder as had been done safely hundreds of times before.

3.   To do the lift, the existing columns are cut at the floor level and then encased in a sturdy steel sleeve.

4.   Workers have covered the bases of some pillars in steel sleeves and have filled the sleeves, as well as cracks in the pillars, with an epoxy.

5.   Workers have covered the bases of some pillars in a steel sleeve and have filled that sleeve, as well as cracks in the pillars, with an epoxy.