A Senate Foreign Relations subcommittee yesterday joined the Democratic leaders in both houses of Congress in asking President Carter to delay [WORD ILLEGIBLE]sale to Iran of [WORD ILLEGIBLE]and expensive flying [WORD ILLEGIBLE]

[WORDS ILLEGIBLE]whispered [WORD ILLEGIBLE]and Republican [WORD ILLEGIBLE]Subcommittee on [WORD ILLEGIBLE]. Chairman Hubert [WORD ILLEGIBLE](D-Minn.) announced the panel will send Carter a letter asking him to withdraw the offer of the $1.2 billion sale and resubmit it in September.

Describing the situation which threatens to become an embarrassment to Carter and the shan of Iran as "very delicate" Humphrey said the subcommittee extension of the current Aug. 5 deadline for action on concurrent House and Senate resolutions to block the sale.

The subcommittee also decided to send the Senate resolution, sponsored by Sen. John Culver (D-Iowa), to the full committee without recommending action on it.

While administration officials concede the sale would not square with Carter's recently announced arms sales restraint policy, they argue that Iran has a real need for an air defense system, and that the controversial Airborne Warning and Central System is the best available option.

Opponents of the sale with a General Accounting Office report to back them up, argue that the advanced technology of AWACS could fall into the hands of the Soviet Union if it is sold to neighboring Iran, and that the system can be used for offensive, as well as defensive purposes.