The glass factory often uses raw quartz sand, and Xiao Bian has compiled its specifications for the glass bottle factory. According to the requirements of the technical strength of the glass, the specifications are also different. . .
Advanced quartz sand: Chemical composition: sio2 ≥ 99.5%; fe2o3 ≤ 0.018%; cr2o3 ≤ 0.00016%; al2o3 ≤ 0.22%. Particle size composition: 20 mesh ~ 120 mesh 40 mesh ~ 80 mesh; 60 mesh ~ 120 mesh; 60 mesh ~ 140 mesh; 80 mesh ~ 150 mesh.
Ordinary quartz sand: Chemical composition: sio2 ≥ 99.3%; fe2o3 ≤ 0.030%; cr2o3 ≤ 0.00040%; al2o3 ≤ 0.40%. Particle size composition: 20-400 meshes.
Precision foundry sand: Physical and chemical standard: sio2 ≥ 99.3%; Mud content: <0.05%; Refractoriness: 1750°C. Particle size composition: 20-400 meshes.
Construction sand: Physical and chemical standards: sio2 ≥ 99.3%; Mud content: <0.05%. Granular composition: 3-30 mesh range.
The density of the travel bag is small and light
The material of the travel bag should have the effect of rainproof water
Polyester durable, good elasticity, not easy to deformation, corrosion resistance, insulation, crisp, easy to wash and quick drying, loved by the people. Now many travel bags are made of this kind of fabric, the most commonly used is the Double Shoulder bag that everyone knows about the camel card.The pull rod box refers to a suitcase with a pull rod and a roller. Because of its convenient use, carry clothes and so on to become travel, go out and be widely used. At the same time, the pull rod box also has a pull rod for the box, and it has the single pipe pull rod and the double pipe pull rod. The pipe of the pull rod also has the square tube and the circular tube's separation, so as to facilitate the walking while dragging, and lighten the burden greatly.
Waterproof Backpack,School Backpack,Tactical Backpack,Canvas Backpack
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