The modification has been made on the black wattle tannin adhesive with sodium sulfite and the MUF concentrate so as to prepare out a tannin adhesive with good water-proof and better glue properties.
采用亚硫酸钠和三聚氰胺- 尿素- 甲醛预缩液对黑荆树单宁胶粘剂进行改性处理，制备具有良好的耐水性能和胶合性能的单宁胶粘剂。
Rib of slab has prominent water-proof capability. It is fixed by hidden key without any glue. No bolt on the outside surface which prevent from pollution and aging.
立边板肋具有极佳的防漏水性能，不需打胶，暗扣方式固定，表面无外露螺钉，免得污染老化问题。
Water-proof adhesive glue should be filled in the inner cavity of junction boxes at wet areas. Connection ends of the parts in hazardous areas shall be added explosion proof daub.
潮湿区域的接线盒内腔应灌注防水胶，防爆区域部件连接端应填加防爆胶泥。
Two kinds of PVA solution, which have different polymerizing degrees, are mixed with ammonium dichromate to obtain a high-resolution, water-proof developing photosensitive glue solution.
本发明方法是用两种不同聚合度的聚乙烯醇溶液与重铬酸铵混合，得到高分辩率的、耐水冲洗显影的感光胶液。
Two kinds of PVA solution, which have different polymerizing degrees, are mixed with ammonium dichromate to obtain a high-resolution, water-proof developing photosensitive glue solution.
本发明方法是用两种不同聚合度的聚乙烯醇溶液与重铬酸铵混合，得到高分辩率的、耐水冲洗显影的感光胶液。
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