| Share | Phrase |
|---|
| 8.82% | fail-safe [security] mechanism |
| 8.46% | fail-safe [security] means |
| 8.39% | fail-safe [security] system |
| 6.81% | fail-safe [security] function |
| 6.81% | fail-safe [security] operation |
| 6.31% | fail-safe [security] valve |
| 4.78% | fail-safe [security] chamber |
| 4.44% | fail-safe [security] circuit |
| 4.26% | fail-safe [security] piston |
| 4.01% | fail-safe [security] relay |
| 3.92% | fail-safe [security] microprocessor |
| 3.59% | fail-safe [security] device |
| 3.11% | fail-safe [security] signal |
| 2.90% | fail-safe [security] action |
| 2.64% | fail-safe [security] flag |
| 2.59% | fail-safe [security] mode |
| 2.13% | fail-safe [security] coupling |
| 1.40% | fail-safe [security] control |
| 1.36% | fail-safe [security] feature |
| 1.28% | fail-safe [security] pressure |
| 1.19% | fail-safe [security] brake |
| 1.19% | fail-safe [security] path |
| 1.19% | fail-safe [security] switch |
| 1.10% | fail-safe [security] unit |
| 0.88% | fail-safe [security] apparatus |
| 0.85% | fail-safe [security] braking |
| 0.76% | fail-safe [security] process |
| 0.74% | fail-safe [security] purpose |
| 0.68% | fail-safe [security] line |
| 0.59% | fail-safe [security] accumulator |
| 0.59% | fail-safe [security] capability |
| 0.59% | fail-safe [security] arrangement |
| 0.51% | fail-safe [security] performance |
| 0.51% | fail-safe [security] section |
| 0.44% | fail-safe [security] manner |