DN800
çæ¥é¢ç®¡å¤å¾æ¯820mmï¼ä¸è¬å¤å¾820mmçå
æçæ¥é¢ç®¡å£åå¨8-12mmä¹é´å·¥ç¨å¸¸ç¨å°ã
æ§è¡çæ¯å½æ GB/5023ã
çæ¥é¢ç®¡æ¯æç¨é¢å¸¦æé¢æ¿å¼¯æ²å形为åå½¢ãæ¹å½¢çå½¢ç¶ååçæ¥æçã表é¢ææ¥ç¼çé¢ç®¡ã çæ¥é¢ç®¡éç¨çå¯ææ¯é¢æ¿æ带é¢ã