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| In certain circumstances Crux Rip-Out Diaphragms may be specified. These buoyancy diaphragms have an integral cutting tool attached which pierces the diaphragm when activated by means of wire rope rigging from the surface.   |  The function of Rip-Out Diaphragms is to accentuate the flooding of previously sealed jacket members or buoyancy tanks, by pulling a cruciform cutter through the diaphragm. | 
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