: Testing the ease of opening and closing the valves.
The MS81-2021 standard, also known as "Malaysian Standard MS 81:2021 - Guide for the Preparation of Statistical Data", provides guidance on the preparation, presentation, and interpretation of statistical data. The standard outlines the general principles and methods for collecting, analyzing, and presenting statistical data in a clear and concise manner. The standard is applicable to various fields, including quality control, engineering, economics, and social sciences. Ms81-2021 Standard Pdf