Adjustable Speed Stirling Engine Model Toy with Vertical Flywheel Science Experiment Features: .Novel Design: This Stirling engine model has a novel and distinctive design with a simple yet elegant shape and a refined oak base that exudes a higher taste level. It is simple to see the dyn..

Electrolysis of Water Generator Heating Process Principle Science Physical Experiment Teaching Model High-Efficiency Lager Size The benefits of the dry-type oxyhydrogen generator are high efficiency, high gas output, simple maintenance, and exquisite heat dissipation. There is little pollution duri..