images hard_hat_workers2211.png 415 416 3 0 helmet Unspecified 0 0 0 224 304 249 334 helmet Unspecified 0 0 0 207 293 230 315 helmet Unspecified 0 0 0 170 257 189 277 helmet Unspecified 0 0 0 254 270 274 298 helmet Unspecified 0 0 0 221 340 253 370