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Calibration and characterization certificates: Length and frequency
 
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2007
No. 40 Helium-neon laser at 633 nm UME, Turkey
No. 39 Helium-neon laser at 633 nm, No. 299s NIS, Egypt
No. 38 Helium-neon laser at 633 nm, No. 385 KRISS, Korea, Republic of
No. 37 Helium-neon laser at 633 nm, No. 9 INM, France
No. 36 Helium-neon laser at 633 nm INRIM, Italy

2006
No. 53 Helium-neon laser at 633 nm, 336S NML-SIRIM, Malaysia
No. 52 Helium-neon laser at 633 nm, No. 181S CEM, Spain
No. 51 Helium-neon laser at 633 nm, No. 445 IPQ, Portugal
No. 4 Helium-neon laser at 633 nm, NPLI-1(1) NPLI, India

2005
No. 67 Helium-neon laser at 633 nm, SMU-1 SMU, Slovakia
No. 66 Helium-neon laser at 633 nm, DK1 DFM, Denmark
No. 65 Helium-neon laser at 633 nm, EIM-1 (LL0401/R16 EIM, Greece
No. 64 Helium-neon laser at 633 nm, INM PHT/HE/97 INM, Romania
No. 30 Helium-neon laser at 633 nm, INM9 INM, France
No. 12 Helium-neon laser at 633 nm, NMi-5 NMi-VSL, Netherlands
No. 11 Helium-neon laser at 633 nm, NIM D1 NIM, China
No. 10 Helium-neon laser at 633 nm, SP2 SP, Sweden
No. 9 Helium-neon laser at 633 nm, IPQ2 IPQ, Portugal
No. 8 Helium-neon laser at 633 nm, VNIIM2 VNIIM, Russian Federation
No. 7 Helium-neon laser at 633 nm, CSIR 4 CSIR, South Africa

2004
No. 71 Helium-neon laser at 633 nm, No. 299s NIS, Egypt
No. 38 Helium-neon laser at 633 nm, MR13 MIKES, Finland

2003
No. 69 Helium-neon laser at 633 nm, INM 125 INM, France
No. 68 Helium-neon laser at 633 nm, GUM 1 GUM, Poland
No. 65 Helium-neon laser at 633 nm, WEO-144 CENAM, Mexico
No. 64 Helium-neon laser at 633 nm, UME-L3 UME, Turkey
No. 63 Helium-neon laser at 633 nm, NRC INMS 2 (A 103) NRC-INMS, Canada
No. 62 Helium-neon laser at 633 nm, WEO NMC, A*STAR, Singapore
No. 61 Helium-neon laser at 633 nm, PL03 CMI, Czech Republic
No. 5 Helium-neon laser at 633 nm, No. NMi 4 - WEO 169 NMi-VSL, Netherlands
No. 4 Helium-neon laser at 633 nm, NMi/TUE 2 NMi-VSL, Netherlands
No. 2 TESA Green Laser, No. 021 CENAM, Mexico
No. 1 Helium-neon laser at 543 nm, No. 08A01/G10 NMC, A*STAR, Singapore

2001
No. 89 Helium-neon laser at 633 nm, No. 132 NPL, United Kingdom
No. 88 Helium-neon laser at 633 nm, No. 107 CEM, Spain
No. 87 Helium-neon laser at 633 nm, No. 116 CEM, Spain
No. 78 Helium-neon laser at 633 nm, No. 180 NMIJ AIST, Japan
No. 75 Helium-neon laser at 633 nm, No. 137 IMGC, Italy
No. 74 Helium-neon laser at 633 nm, No. 129 BKG, Germany
No. 73 Helium-neon laser at 633 nm, No. 113 BKG, Germany
No. 53 Helium-neon laser at 633 nm, No. 158 IAG, Germany
No. 52 Helium-neon laser at 633 nm, No. 164 IAG, Germany
No. 51 Helium-neon laser at 633 nm, No. 159 METAS, Switzerland
No. 50 Helium-neon laser at 633 nm, No. 136 ORB, Belgium
No. 49 Helium-neon laser at 633 nm, No. 176 IGN, Spain
No. 48 Helium-neon laser at 633 nm, No. 160 GSD, Canada
No. 47 Helium-neon laser at 633 nm, No. 130 GSD, Canada
No. 46 Helium-neon laser at 633 nm, No. 102 NIST, United States
No. 45 Helium-neon laser at 633 nm, No. 148 BEV, Austria
No. 44 Helium-neon laser at 633 nm, No. 146 EOST, France
No. 7 Laser à hélium-néon de longueur d'onde 633 nm, NCM2 NCM, Bulgaria
No. 6 Laser à hélium-néon de longueur d'onde 633 nm, NCM1 NCM, Bulgaria
No. 5 Laser à hélium-néon de longueur d'onde 633 nm, no 68902 OMH, Hungary
No. 4 Laser à hélium-néon de longueur d'onde 633 nm, no 116 CEM, Spain

Study Notes
2005
No. 18 Helium-neon laser at 633 nm Geodesic Survey Division, Canada
No. 17 Helium-neon laser at 633 nm EOST, France
No. 16 Helium-neon laser at 633 nm CMS/ITRI, Chinese Taipei
No. 15 Helium-neon laser at 633 nm NMIJ/AIST, Japan
No. 14 Helium-neon laser at 633 nm ECGS, Luxembourg
No. 13 Helium-neon laser at 633 nm IGN, Spain
No. 12 Helium-neon laser at 633 nm BEV, Austria
No. 11 Helium-neon laser at 633 nm METAS, Switzerland
No. 10 Helium-neon laser at 633 nm GOP, Czech Republic
No. 9 Helium-neon laser at 633 nm INRIM, Italy
No. 8 Helium-neon laser at 633 nm FGI, Finland
No. 7 Helium-neon laser at 633 nm BKG, Germany
No. 6 Helium-neon laser at 633 nm CNRS, France
No. 4 Helium-neon laser at 633 nm ORB, Belgium
No. 1 Helium-neon laser at 633 nm, BIW167 Winters Electro-Optics, United States

2001
No. 8 Laser à hélium-néon de longueur d'onde 633 nm, no 19 FGI, Finland
No. 7 Laser à hélium-néon de longueur d'onde 633 nm, no 18 FGI, Finland
No. 6 Laser à hélium-néon de longueur d'onde 633 nm, A10 BKG, Germany
No. 5 Laser à hélium-néon de longueur d'onde 633 nm, no 118 EOST, France