四吊点平衡架的革新为了解决老式四吊点平衡架吊装板形构件的不平衡问题，消除各种误差，我们通过长期观察、分析和试验，设计出一种新型四吊点平衡架（见图），该平衡架每套由甲乙两片组成，直接套入吊钩，以吊钩为转轴，从而起到调节平衡的作用。通过使用，效果很好。具... The innovation of the four suspending point balancer is to solve the unbalance problem of the old-fashioned four-lift point balancer lifting plate-shaped member and eliminate various errors. Through long-term observation, analysis and experiment, we have designed a new four-suspension point balancer (see Figure), the balance of each set of two pieces of A and B, directly into the hook, with the hook as the axis, which play a role in adjusting the balance. By using it, it works well. With...