US$ 314.00
illustrating the high-ratio speed reduction and self-locking action of worm gearing
and oscillating springs
Long 1000mm black insulated lead with crocodile clips at both ends
5A bobbin coil for the demountable transformer
Paleozoic Bivalve Fossil Replica, 3cm Type_Low Form illustrating the high-ratio speed reductionThree cm Paleozoic bivalve fossil replica demonstrates ancient marine shell anatomy for classroom paleontology without disturbing original specimens.
US$ 314.00
US$ 74.00
US$ 50.00
US$ 170.00
US$ 1150.00