光(guang)(guang)滑限孔用量規(gui)(gui)，產(chan)品規(gui)(gui)格：各(ge)種(zhong)光(guang)(guang)滑塞規(gui)(gui)IT6級以(yi)上（含6級）直(zhi)徑1.6~320mm各(ge)種(zhong)光(guang)(guang)滑環規(gui)(gui)，對(dui)表圈：直(zhi)徑φ8-400mm度(du)為±0.002。