DIN 28427:1983-02 Vacuum technology; acceptance specifications for diffusions pumps and vapour jet vacuum pumps for vapour pressures of the pump fluid <1 mbar
1983DIN 28427:1983-02 Vacuum technology; acceptance specifications for diffusions pumps and vapour jet vacuum pumps for vapour pressures of the pump fluid <1 mbar
1983DIN 28427:1983 Vacuum technology; acceptance specifications for diffusions pumps and vapour jet vacuum pumps for vapour pressures of the pump fluid 1 mbar