求翻译：在试验条件基本相当的情况下，钢管的磨损值最小（80万次后为0.276mm），玻璃钢和HDPE双壁波纹管其次，钢筋混凝土管磨损值最大（80万次后为0.742mm）；是什么意思？

Roughly equal to the experimental conditions in the case, the wear value of the minimum steel (80 million times after 0.276mm), glass, steel and HDPE double wall corrugated pipe Secondly, the largest reinforced concrete pipe wear value (80 million times after 0.742mm);

正在翻译，请等待...

In the test condition basic suitable situation, the steel pipe attrition value most is small (800,000 from now on is 0.276mm), the glass fiber reinforced plastic and the HDPE dog-legged corrugated pipe next, the steel bar concrete pipe attrition value most is big (800,000 from now on is 0.742mm);

Trial conditions of roughly comparable cases, minimum wear of steel pipe value (after 800,000 0.276mm) co and HDPE double wall bellows followed, reinforced concrete pipes and wear a maximum (after 800,000 0.742mm);

In the case of test conditions, minimum wear of steel tube (after 800,000 0.276mm), glass fibre reinforced plastic and HDPE double wall corrugated pipe followed, reinforced concrete pipe abrasion value maximum (after 800,000 0.742mm);