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硬质钨钢球合金球29.705/29.71/29.715/29.72/29.725/29.73mm钢珠
针规高精度塞规29.7 29.71 29.72 29.73 29.74 29.75 29.76mm
深立工针规塞规量棒棒规销规29.7
针规塞规量棒29.7 29.71 29.72 29.73 29.74 29.75 29.76 29.77
销式针规塞规高精29.71/29.72/29.73/29.74/29.75/29.76/29.77MM
精密针规销式塞规29.71/29.72/29.73/29.74/29.75/29.76/-29.79MM
针规塞规29.71/29.72/29.73/29.74/29.75/29.76/29.77/29.78/.79