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Outline
In this paper, it is compared and analyzed the design scheme for standard block at addendum of manufacturing enterprise A of measuring equipment from such two aspects as the measurement principle, method and basis of calibration as well as calibration reports of calibration organizations B and C. It is found that all the above manufacturing enterprise and calibration organizations of measuring equipment do not manufacture and calibrate measuring equipment completely according to standards as a result of bringing hidden danger for processing and measuring oil casing thread. Therefore, the optimal combination scheme for calibration slot of standard block is put forward so as to reduce the cost of measuring equipment and improve practicability. It is suggested that thread processing enterprises put forward clear calibration items and tolerance to calibration organization in calibration of measuring equipment to satisfy the standard requirements and improve product quality.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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