QBN2-25D型棒式绝缘子表示什么意义？
["QB\u8868\u793a\u7535\u6c14\u5316\u94c1\u9053\u8155\u81c2\u7528\u68d2\u5f0f\u7edd\u7f18\u5b50 N\u8868\u793a\u8010\u6c61\u578b 2\u8868\u793a\u7528\u4e8e\u91cd\u6c61\u533a 25\u8868\u793a\u989d\u5b9a\u7535\u538b25 KV \u3002D\u8868\u793a\u7b54\u53e3\u5f84"]