Question : oracle 10g - Remove Duplicates from large table

I have the following table CUSTOMER_CONTACTS in customer contact mart database. Due to some wrong sqls 230 million records got inserted into this table by mistake for the last 2 yrs. This table doesnt have any primary key constraint as only all the fields in this table will combine to form a unique combination.
This table should supposed to have 7 - 10 million records only and i would like to remove the duplicates(only if all the fields in a record match exactly all the fields in another record).

Please let me know the efficient way for the removal of duplicates from this very large table. This is really urgent as the DB is running low on space and the data needs to be removed asap.

CREATE TABLE CUSTOMER_CONTACTS
(
  EEE_ACTIVITY_ID       VARCHAR2(100 BYTE),
  ACTIVITY_TYPE_PK      NUMBER,
  COUNTRY               VARCHAR2(4000 BYTE),
  COUNTRY_TYPE          NUMBER,
  COUNTRY_ERROR         NUMBER,
  REGION                VARCHAR2(4000 BYTE),
  REGION_TYPE           NUMBER,
  REGION_ERROR          NUMBER,
  CONTACT_NAME          VARCHAR2(300 BYTE),
  STAKEHOLDER_NUM       NUMBER,
  SOURCE_ACTIVITY_DATE  DATE,
  INSERT_SEQUENCE       NUMBER,
  CUST_ACT_VALID        VARCHAR2(1 CHAR)
)
TABLESPACE EZMADD;

Answer : oracle 10g - Remove Duplicates from large table

>>the newtable will only accept unique records, ...

Agreed.  That is why I already proposed this exact solution in http:#a32789356