21.   The effort was further delayed recently by two failures of Proton rockets, the launcher the Russians will use to put the modules in orbit.

22.   The J-shaped hooks are used to put in place the electrical coil that sends shocks to a pacemaker to keep a diseased heart beating regularly.

23.   Most of those who had been hurt suffered from respiratory trouble caused by the tear gas used to put down the revolt, hospital sources said Thursday.