If they have the equipment that reproduces the standard, people anywhere can check that their measurement of length is the same as everyone else’s.
परंतु, मोजमापाच्या प्रमाणात अथवा मानकात थोडा जरी बदल झाला, तरी पुढचे सर्व काही अनिश्‍चित होऊन जाते.