亚洲性无码av在线欣赏网,大地资源在线观看官网第三页,精品国产乱码久久久久久影片,一二三四在线视频社区3

USES: The new polymer material synthesizes the polymer engineering material intermediate, may with other polymerization monomer polycondensation copolymerization, synthesizes the high strength, the high heat-resisting, the corrosion-resisting polysulfone, polyethersulfone and so on the high polymer engineering material, widely used in electronics, instrumentation and high-speed railway aircraft and aerospace departments for heat-resistant, corrosion-resistant, high-strength parts and insulation parts. Also used as an organic synthesis intermediate.

Packing: Solid 25kg woven bag or kraft paper bag or carton, 25/50kg cardboard or paper drum, 500kg ton bag.