Holding that company’s decision to transfer and subcontract its parts assembly operation was a mandatory bargaining subject because the transfer did not significantly alter the nature of the company’s business, company incurred no significant capital expenditures, and transfer occurred shortly after company unsuccessfully sought economic concessions from the union
Finding that the "proper question `is not whether an employee actually felt intimidated but whether the employer engaged in conduct which may reasonably be said to tend to interfere with the free exercise of employee rights under the Act'" (quoting Joy Silk Mills, supra, 185 F.2d at 743-44)