SEOUL, NOV. 24 -- The main South Korean opposition parties today accused the ruling Democratic Justice Party of using a wide range of illegal campaign tactics, including bribery, to win votes for that party's candidate, Roh Tae Woo.

The parties led by opposition presidential candidates Kim Young Sam and Kim Dae Jung released what they said was a government document instructing nonpartisan provincial officials to cooperate with the ruling party, according to news reports here.

Political pressure on Roh came from another front today when two retired generals held a press conference to denounce Roh's version of the coup that he helped mastermind on Dec. 12, 1979, bringing Chun Doo Hwan to power.

Gens. Chong Byong Ju and Kim Chin Ki, both forced to retire after the coup, said the takeover amounted to a mutiny rather than the nation-saving event described by Roh and Chun in their versions of the takeover after the assassination of president Park Chung Hee.

To illustrate the violence involved in what official accounts imply was a relatively peaceful power transition, Chong rolled up his left sleeve at the press conference, revealing a nasty scar near his elbow that he said resulted from a bullet wound suffered during the coup.

The campaign violations alleged by the opposition parties also included cases in which the ruling party gave away men's suits, expensive women's handbags and sacks of rice, and offered pay raises for some workers.

The ruling party's spokesman was quoted in evening newspapers as denying the charges, describing them as "fabrications" and "a typical opposition trick."

A spokesman at the Home Ministry, which was accused of sending the alleged instructions to provincial officials, reportedly said, "We have never directed local officials to provide the {Democratic Justice Party} with unfair helping hands."

The statement by Kim Dae Jung's party said violations included a promise by the state-run Pohang Iron and Steel Co. that workers would receive bonuses if Roh was elected, while the police chief in the city of Wolsong allegedly warned his men that they faced dismissal if Roh received less than 40 percent of the vote.

The statement also said bags of free rice were distributed in an area of the industrial city of Sognam.

In the provincial city of Suwon, coupons for men's shoes and women's scarves were distributed by officials seeking votes for Roh, according to news reports. And some low-level government employes were given bribes of less than $100 to vote for Roh, the Kim's party statement alleged.

Although most provincial officials are appointed by the ruling party, they are supposed to stay The officials represent a potent, though easily identifiable, corps of campaign workers whose work could sway the election result, observers said.