Its main parts was the half-calotte Metal-Rubber manufactured by the new technics of facture and advanced mold.
器主要构件为带边沿帽的半球壳状金属橡胶件。
Its main parts was the half-calotte Metal-Rubber manufactured by the new technics of facture and advanced mold.
器主要构件为带边沿帽的半球壳状金属橡胶件。
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