The Board, in our opinion, was correct in holding that Delsea Iron Works, Inc., the respondent, violated Section 8(a) (1) and (3), 29 U.S.C.A. § 158(a) (1) and (3) of the National Labor Relations Act as amended, by discharging and later refusing to reinstate the thirteen strikers and that the walkout constituted protected concerted activity within the meaning of the Act. Indeed, the evidence admits of no other conclusion. We find the determination of the Board to be correct in all respects and accordingly its order must be enforced. A decree in the usual form may be submitted.