folding ruler

释义

折尺；

Folding ruler
Folding ruler
Folding ruler
Level and angle attachment for a carpenter's folding ruler
Folding rulers inside triangles
On folding rulers in regular polygons
A ferrocene based switchable molecular folding ruler.
BIOPHYSICS: A Folding Ruler
Folding Ruler Star
Folding Ruler Star
A Folding Ruler
Measuring angles with a carpenter's folding ruler
Stimuli-responsive folding and unfolding of a polymer bearing multiple cerium(IV) bis(porphyrinate) joints: mechano-imitation of the...