1ã渤海ä¸é»æµ·åç线ï¼è¾½ä¸åå²å端èéå±±è§ä¸å±±ä¸åå²å岸è¬è±è§çè¿çº¿ã
2ãé»æµ·ä¸ä¸æµ·åç线ï¼é¿æ±å£å岸ä¸é©å½çæµå·å²è¥¿åè§ä¹é´çè¿çº¿ã
3ãä¸æµ·ä¸åæµ·åç线ï¼å°æ¹¾å²å段ä¸é½ç²¤ä¸¤ç交çå¤ä¹é´çè¿çº¿ã