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Mechanical stop clock stop clock 60s0.1s physics teaching instrument timing stop clock stopwatch teaching aids equipment
Specifications:
- teaching clock: stopwatch clock
- Subject: Physics
- stop clock: physics teaching aids
- Origin: CN(Origin)
- Model Number: Mechanical stop clock
- Brand Name: HOGNSIGN
- Free shipping
We offer free shipping for all products
- Free returns*
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- Low prices
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- 5 million products
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