absolute strength
7.When the raw materials have been chosen according engineering demanded durability,W/B can be selected primary from the“relationship between chlorion diffusivity and permeability with NEL method”,then to calculate mix proportion using the absolute volume method,and to try mixing and verify the strength.
9.On both sides, strength and weakness, superiority and inferiority, have never been absolute, and besides, our efforts in persevering in resistance to Japan and in the united front during the war have brought about further changes in the original balance of forces between us and the enemy. Therefore, in this stage the enemy's victory and our defeat are definitely restricted in degree, and hence the war becomes protracted.

