Negotiators for striking producers, writers and technicians yesterday outlined to NBC officials their objections to the terms of a final contract offer that the network unilaterally imposed in June.

NBC officials on Wednesday had asked the National Association of Broadcast Employees and Technicians, which represents about 2,800 striking workers at the network, to list their objections to the company's proposal, item by item.

"The union is addressing and explaining, at the company's urging, what we find distasteful about their horrendous final offer," NABET spokesman John Krieger said yesterday.

"What that input will produce, I have no idea," Krieger said. "But for the first time since this strike began, at least there is some dialogue going on."

Meanwhile, about 150 members of NABET and supporters from other unions who have contracts with NBC's parent company, General Electric, were joined by AFL-CIO President Lane Kirkland at a two-hour rally in Lafayette Park, across the street from the White House.

"We will be looking to GE, as NBC's parent, to assume responsibility for the errant ways of its offspring," Kirkland told the demonstrators. "There is no greater example of the solidarity that is the source of all our hopes and aims than what we see day by day on the NBC picket line."

NABET officials said yesterday that the union's three primary objections to NBC's final contract offer are its short two-year duration, the company's desire to expand the use of part-time free-lance workers and provisions that would restrict the union's jurisdiction.

"Money has never been an issue, even though the package is inferior to the one we have at ABC," said Krieger. "But under this proposal with people retiring, others being laid off and not replaced with full-time employes, we figured that in about three years we could be wiped out as a union."

As an example, NABET officials said the NBC proposal would allow the company to use up to 150 daily hires and another 300 temporary employes nationwide on any given day.

In addition, they said, the network wants the right to use nonunion workers for up to 20 percent of the crews on each of a variety of its sports remotes.

"They're telling us they need the daily hires to cut down on overtime," Krieger said. "We told them there are ways they can cut down on overtime without proposals that undermine the union."

Krieger acknowledged the accuracy of figures from an NBC consultant showing that with overtime, engineers, cameramen and sound technicians make an average $110,000 a year. But he said the base pay for those workers is in the range of $850 a week.

The talks resumed here under the auspices of the Federal Mediation and Conciliation Service on Tuesday after being recessed for more than a month