| 摘 要： | Lack of familiarity with standards as an outstanding cause of error. ——Errors or variations in stapling cotton may be due to lack of knowledge of the official staple types. Erratic stapling, as well as the tendency to class too hard or too easy, may result from unfamiliarity with the standards. It is important that before each day's work begins and frequently during the day, the classer pull the types representing the range of lengths heing classed. Th(?)s classers should be able to adjust accurately their concepts of lengths to the types and thereby avoid departures from them. When a sample is stapled that is out of the prevailing range being classed, one or more of the official staple types should
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