The dosage of leak of ray of X of electron microscope of safe requirement GB7667-87 that GB6738-86 report measures directive and record appearance and its accessory stipulates GB9316-88 photographs to flash with the electron plant safety asks the copycat of electric and safe GB11921-89 of GB10320-95 laser equipment and establishment fetterses balancing machine of safe protection GB12977-91 CNC Milling