北玻U形管玻璃U型管实验室用U形压力计耐酸碱

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• intros：{"brand_intro":"北玻（北京玻璃仪器厂）成立于1958年，是中国最大的实验室玻璃器皿制造商之一。产品覆盖科研、医疗、化工等领域，拥有多项玻璃加工专利。其U形管以'零瑕疵'品控著称，每批次抽检率达100%。在国家级实验室和高校中占有率极高，是高端国产替代的代表。","product_intro":"北玻U形管采用特制低膨胀硼硅玻璃，热膨胀系数仅3.3×10⁻⁶/K。管壁经抛光处理，内壁光滑不挂液。U型弯管采用一次成型技术，无焊接痕迹。刻度为白色珐琅材质，耐刮擦且对比度高。标配PTFE（聚四氟乙烯）旋塞，耐强酸碱。适用于痕量分析、高纯气体操作等严苛场景。","key_specs":{"材质":"低膨胀硼硅玻璃（3.3）","管径":"10mm/15mm/18mm可选","壁厚":"1.8mm±0.05","耐温范围":"-60℃~300℃","刻度精度":"±0.1mm","包装":"单支真空塑封+泡沫盒"}}
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