It is shown that permitted load curve must be implemented in choosing crank press 在选用压力机时，必须严格按照许用负荷曲线图来选择。
3.
The count method of the pressure ability and torque ability of crank press has been introduced with the relation of the two kinds ability of the crank press and force - angle curve gained by analyzing and computing the data of ja21 - 18 crank press ability 摘要介绍了曲柄压力机的压力能力、扭矩能力的计算方法，并通过对ja21 - 18型曲柄压力机的能力分析计算，得出此种压力机两方面能力分别与力转角曲线图的关系。
