zero distance connection

(pressure)gauge with back connection

(pressure)gauge with bottom connection

3-D connection

3-Phase Parallel Connection

3D connection

4-adjacent connection

4PT connection

4WD lamp electrical connection

6-adjacent connection

8-adjacent Connection

90 connection

90° connection

A discussion of fiber connection

Abnormal pancreatico-cholangial connection

aborted connection

AC single-phase series connection

access connection

accordant connection

active connection