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【范围】
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This SAE Aerospace Recommended Practice (ARP) is intended to provide definitions of and
recommendations for drawing limits pertaining to surface and edge features on machined metal fluid
fittings and is subject to change to keep pace with experience and technical advances. The subject
includes: features, descriptions and definitions, examples, limits, inspection methods and standard
drawing callouts where applicable. Fittings may retain unmachined material surfaces that exhibit
similar surface features as machined surfaces and may be inspected to the same criteria. These
unmachined surfaces may also contain unique features that are addressed separately. See Figure 1
for the relationship of surface and edge features.strRefField
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