范围图 meaning in English

areal map
extent map

To prevent premature failure of the reinforced plastic fiberglass sucker rod , high quality products should be purchased , proper wells should be selected , the rod string design should be based on the stress range chart and operation and management should be carried out according to requirements
为防止玻璃钢抽油杆早期失效，应严把产品进货质量关；正确选择油井；按应力范围图进行玻璃钢杆柱设计；按要求作业施工；完善生产管理措施。