| 摘要 |
An engine installation includes an engine casing, an engine ancillary having a mounting flange and a plate. The flange has arcuate apertures spaced about the axis of a drive shaft to receive securing bolts to secure the flange and plate to the casing. The plate has complementary apertures of circular section and means is provided to secure the plate to the flange once the ancillary has been correctly positioned on the casing, whereby the plate and ancillary can be removed from and reassembled to the engine casing without disturbing the angular setting of the ancillary on the casing.
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