a modest spur to induce others to come forward with valuable contributions

acromio-clavicular spur

amplitude-quantization spur

Apple spur type varieties

asymmetric spur gear

asymmetrical involute spur gear

axle spur wheel

bevel-spur gear reducer

blunted spur

bone spur

bouquet spur

Calcaneal spur

Calcaneus Spur

change spur gear

Choice-Spur

Circumfluent Spur Dike

Competitive reactions in the spur

Compound Planetary Spur Gear Set

Computer-aided Parameterized Design of Spur Gear

Cone Spur Gear Involute