天气预报15天查询> 其他> 天平使用方法口诀

天平使用方法口诀

更新时间: 2020-10-29 00:00:00     

方法1:放平天平调平衡,左物右砝两边分;镊加砝码大到小,拨动游码须认真;被测质量两相加,整好器材方走人。方法2:一放平,二归零,三调螺母梁平衡。螺母要向轻端移,天平调好不要动。左物右砝两盘盛,加减砝游再平衡。取码需用镊子夹,先大后小记心间。砝游之和是读数。如若物砝位置反。读数砝游要相减。

关键词: 天平 使用 方法 口诀

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-154524/ | 耗时:0.5167 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=154524 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=154524 LIMIT 0,1
select * from tbl_Articles_sphinx where id=154524 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1117450,1918375,415487,850616,939354,774628,227031,1729770,1323126,224195,211288,264457,350932,294415,1769124,791185,623406,957905,135173,1078773,355404,1757522,1083141,459317,1611555,793106,1122422,457101,670909,1745110) ORDER BY field (ArticleID,1117450,1918375,415487,850616,939354,774628,227031,1729770,1323126,224195,211288,264457,350932,294415,1769124,791185,623406,957905,135173,1078773,355404,1757522,1083141,459317,1611555,793106,1122422,457101,670909,1745110)