Observers from Earth can see two types of eclipses â eclipses of the Sun (solar eclipses), and eclipses of the Moon (lunar eclipses). These occur when the Sun, Earth and Moon align in a straight or almost straight configuration.
TRR may refer to: 1  China Bay Airport near Trincomalee, Sri Lanka. 2  Tamper-resistant receptacle, child-safe power receptacle required in new and renovated dwellings since the U.S. 2008 National Electrical Code.3  Target row refresh, a hardware feature of DDR4 used to prevent the row hammer effect from occurring. Tamper-resistant receptacle, child-safe power receptacle required in new and renovated dwellings since the U.S. 2008 National Electrical Code. 2  Target row refresh, a hardware feature of DDR4 used to prevent the row hammer effect from occurring.
TMR is a cardiac surgical procedure that creates conduits or channels through the wall of the heart. This improves blood flow into areas of the heart that are not amenable to direct revascularization.The heart continues to beat during the procedure, so there is no need to use a heart/lung bypass machine. revolutionary laser surgery that treats chronic chest pain, TMR is the best hope for angina patients who are not candidates for bypass surgery or angioplasty. TMR uses a laser beam to open channels in the wall of the heart, restoring blood flow and oxygen.