ความถี่คือ 560 AM คลาสอะไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What is the class when the frequency is 560 AM?It is not neccessary to use all the tables.
 table_70115:  "Identifier" [ text]  "Frequency" [ text]  "Power" [ text]  "Class" [ text]  "RECNet" [ text] 
SELECT "Class" FROM table_70115 WHERE "Frequency" = '560 am'