pend - phot
- pendular measurements
- pendulum
- pendulum apparatus
- pendulum bob
- pendulum determinations
- pendulum deviation
- pendulum flexure
- pendulum gravity instrument
- pendulum instrument
- pendulum length
- pendulum measurements
- pendulum observation
- pendulum point
- pendulum station
- pendulum support
- pendulum vector
- pendulum vibration
- Pennsylvania
- pentagonal prism
- pentagonal prism square
- pentagram
- PER
- per cent of slope
- percentage error
- percentage of accuracy
- perceptance
- perception of depth
- perception of relief
- perennial
- perfecting press
- perforate
- perigon
- perigon angle
- periodic variation
- permanence
- permanent bench mark
- Permanent committee on Geographical Names
- permanent geodetic beacon
- permissible variation
- perpendicular bearing of plate
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