07:25 Sep 19, 2001 |
Spanish to English translations [PRO] Tech/Engineering | |||||||
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| Selected response from: Laura Molinari Canada Local time: 14:24 | ||||||
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4 | manholes with inner safety mesh screen |
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manholes with inner safety mesh screen Explanation: See the reference below The Series No. 51500 Pressure / Vacuum Manhole Cover Vent provides an effective vapor seal until pressure or vacuum relief is required to protect the tank. The vacuum vent is spring-loaded to relieve at a negative pressure of 2 oz./in.². A wire mesh screen surrounds the vacuum port to minimize the possibility of foreign materials entering the tank. Reference: http://www.protectoseal.com/51500.html |
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