Compression fittings for attaching tubing (piping) commonly have ferrules in them.
Pipe fittings, the fitting is screwed in until tight, difficult to orient an angled fitting correctly without over or under tightening.
data compression | Data compression | Lossy compression | Image compression | Dynamic range compression | Video compression picture types | Gain compression | Curve fitting | Compression fitting | Audio compression (data) | speech compression | Flare fitting | FCX file compression | Dynamic range compression (audio) | curve fitting | Compression therapy | Compression of Genomic Re-Sequencing Data | Cold compression therapy | audio compression |