effectual countermeasures

effectual cross-sectional area of spinal canal

effectual duration

effectual factors

effectual porosity

Effectual Stress System

(Z2)(k)-action

(Z2)k-action

2-torus action

600-daty-action

90% duration of action potential

A cid-base action

a collateral civil action

a complete set of action

a jet action

abandonment of action

abandonment of right of action

abatement of action

abnormal action

abrasion action