How to extract/read seed for Electrum wallet created with 2FA - two factor authentication?

Menu Wallet->Seed is grey. Is there any way to restore my seed? I have my password to sign any transaction for my wallet, and 2FA is working correctly, too.

How could I export private key from my wallet in Electrum when using 2FA - two factor authentication?

I have exported private keys, and I got list of pairs: address - private key. However I am not able to import these private keys to another wallet (other then electrum)

Each of the address starts with "3". I have read on some forum, that it means that keys are encrypted using multiple signing keys, and I need all of the signing keys to decrypt private key. How to do it? I have my password, and 2FA functionality working when using Electrum wallet.

I need to obtain my private keys, in order to redeem BCC, from Electrum wallet. I do not have seed, and it looks that it is not possible to read seed in Electrum with 2FA, so I do not know any other way of redeeming BCC.