Name Material Density(kg/m3) Resilience Hardness (N) Number of cells Tensile strength... ECT Ether 18 ±5 35 ≦ 110 ±20 30 ≦ 70 ≦ ECS Ether 22 ±2 42 ≦ 110 ±23 35 ≦ 70 ≦ ECA Ether 26 ±2 45 ≦ 130 ±25 35 ≦ 80 ≦
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