1.   And it urged the widespread installation of valves that close automatically in case a line ruptures, or valves that can at least be operated by remote control.

2.   In a few tragic cases, the soil has shifted so much that gas lines have ruptured and houses have blown up.

3.   Speculation in the garage was that either a tire had blown or an oil line ruptured, coating the tires with slick oil and starting the fire.

4.   The U.S. officials agree that fuel lines ruptured in both Korean crashes.

5.   Yet the aging lines are rupturing with growing frequency, often polluting soil, creeks and underground water supplies.

6.   One crewman was killed and several others injured when a high-pressure steam line ruptured aboard a Russian nuclear missile cruiser in the Baltic Sea, officials said Monday.