| 41. | Welfare serves as a safety valve for an economy that cannot handle full employment.
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| 42. | Russia has become a safety valve for the impoverished republics.
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| 43. | But to me the most important safety valve we have here is the sunset.
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| 44. | The United States has added its own further safety valve.
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| 45. | Artists have art as a safety valve for their neuroses.
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| 46. | The crew immediately closed a safety valve deep in the well, shutting it down.
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| 47. | It said the current system " cannot serve as an adequate safety valve ."
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| 48. | Migration north _ legal and illegal _ provided the PRI with a safety valve.
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| 49. | Education for veterans after the war also proved to be a big economic safety valve.
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| 50. | Ramsbottom also included his newly designed tamper-proof safety valves.
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