1 A nomograph for determining gas in place (GIP) in a closed gas field is presented in this paper based on the material balance equation.

2 A special nomograph designed for calculating the normal specific acoustic impedance is proposed.

3 A nomograph for evaluating oxygen transmission rate of some barrier plastic films was introduced in this paper.

4 By referencing to the nomograph, it is easy to find tension value at any load position within the span of suspended rope, avoiding complex calculation procedure with third degree tension equation.

5 The graphic method calculating position errors of holes on watCh plated - application of nomograph theory is discussed.

6 Since the formula is complicated in its manipulation, a nomograph based on the equation has been developed.

7 It was suggested to evaluate the extent of BF intensification by representing the bosh gas index in nomograph, and the direction to further intensify the BF was described.