YG6钨钢球硬质合金球4.935/4.94/4.945/4.95/4.955mm扩孔挤孔钢珠

高精度针规光面塞规销式规n规4.905 4.915 4.K925 4.935 4.945

钨钢塞针规4.935 4.945 4.955 4.965 4.975 4M.985 4.995量棒5.00

钨钢塞针规4.935 i4.945 4.955 4.965 4.975 4.985 4.995量棒5.00

钨钢塞针规4.935 4.945 4.955 4.965 4.G975 4.985 4.995量棒5.00