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介绍了一种通用程序，用来计算螺杆压缩机中的所有有用的几何关系和参数，转子根部型线可以是任意形状。其中的几何关系还包括那些用来模拟压缩机工作过程建立的热力动力模型所需要的几何尺寸。例如，以两转子和壳孔为边界的横截面积、空腔容积、轴向和径向排气孔的面积、啮合线长度、沿壳孔两个切点的气孔面积、在吸、排气结束时转子根部型线的啮合点到壳孔的密封线长度和泄漏的通道。所有这些被表示成阳螺杆转角的函数、几何参数包括那些热力动力学模型和压缩机设计方案中所需的数据。例如，啮合常数、全螺纹横截面积、理论和实际的空腔容积、吸气角和排气点的开口角、吸气套和排气套的体积等。木文叙述了几何关系，和参数的定义以及数学计算步骤。
A generic program is introduced to calculate all the useful geometrical relationships and parameters in screw compressors. The rotor root profile can be of any shape. The geometry involved also includes the geometric dimensions needed to model the thermodynamic model established during compressor operation. For example, the cross-sectional area bounded by the two rotors and the shell hole, the volume of the cavity, the area of the axial and radial vents, the length of the meshing wire, the area of the stomata along the two tangent points of the shell hole, The end of the rotor root profile meshing point to the shell hole seal line length and leakage of the channel. All of these are expressed as a function of the male screw angle and the geometric parameters include those required in the thermodynamic model and the compressor design. For example, the engagement constant, the full thread cross-sectional area, the theoretical and actual cavity volume, the suction angle and the opening angle of the vent, the volume of the suction and exhaust sleeves, and the like. Wood describes the geometric relations, and the definition of parameters and mathematical calculation steps.