Besides the product has low specific gravity, high strength, good thermal stability, and low thermal conductivity.
产品容重低，强度及热稳定性高，导热系数小。
The results show that fly-ash is of low specific gravity, low compressibility, high strength and high permeability etc .
结果表明粉煤灰具有质轻、压缩性低、强度高、渗透性好等特点，粉煤灰的压实干密度对含水量不是很敏感。
They are particularly suited to low specific gravity applications where the back-to-back design and center bush provide natural axial balance and additional shaft support.
该类型泵特别适合于低比重介质的工况， 在这种情况下背对背的设计及中间衬套可以产生自然的轴向平衡和附加的轴支撑。
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