馬德堡半球 規格：
1.半圓型，直徑11×高11cm。
2.球體二個，金屬製，附活栓一組。
3.固定鐵架一組。
Closer to its original version than the plastic or rubber models.
Cast-iron walls withstand high pressures. Constructed with precision machining and equipped with a brass valve to prevent leakage. Dimensions, Φ 110mm× 110mm high.
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