搪玻璃填料密封箱

212搪玻璃机械密封

Glass-lined stuffing sealing box

Glass-lined mechnical sealing

防腐蚀压力表

搪玻璃放料阀

Anti-corrosion pressure meter

Glass-lined-steell valve

搪玻璃贮罐液面计

222型釜用机械密封

Glass-lined fluid level guade for tank

TYpe 222 mechnical sealing gland for distiler