花岗岩的工业用途-花岗岩平台

作者: 日期: 2016-05-23 11:51:24 人气: - 评论: 0

花岗石平板是用天然的石质材料制成的精密基准测量工具,对仪器仪表、精密工具、机械制件的检验,都是理想的基准面。特别是用于高精度的测量方面,由于它得天独厚的特性,而使铸铁平板相形见拙。花岗石取材于地下优质的岩石层,经过亿万年自然时效,形态极为稳定,不用担心因常规的温差而发生变形。 


 花岗岩平台平板特性 刚性好,硬度高,耐磨性强,不怕酸,碱液物侵蚀,不会生锈,不涂油,不易粘微尘,维护,保养方便简单,使用寿命长。无划痕,无恒温条件阻止,在常温下可保持温度量精度。不磁化,测量时能平滑移动,无紧绷感,不受潮的影响,可在重负荷下保持高精度。 花岗岩平台物理性能:比重:2970-3070千克/平方米抗压强度:245-254N/ M㎡线膨胀系数:4.61×10-6/℃吸水率:<0.13%肖氏硬度:HS70以上。


 花岗岩平台制造和验收标准:按国家标准GB/T20428-2006,接受JJG117-2005标准制造。  

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  2. 视图: /data/htdocs/222_lanhui/twcms/view/default/article_show.htm
  3. 控制器: /data/htdocs/222_lanhui/twcms/control/show_control.class.php
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  2. #1 [time:0.0002s] SELECT * FROM tw_runtime WHERE k='cfg' LIMIT 1 [explain type: const | rows: 1]
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  4. #3 [time:0.0002s] SELECT * FROM tw_cms_article WHERE id='18' LIMIT 1 [explain type: const | rows: 1]
  5. #4 [time:0.0004s] SELECT * FROM tw_cms_article_data WHERE id='18' LIMIT 1 [explain type: const | rows: 1]
  6. #5 [time:0.0002s] SELECT id FROM tw_cms_article WHERE cid='10' AND id<'18' ORDER BY id DESC LIMIT 0,1 [explain type: range | rows: 8]
  7. #6 [time:0.0001s] SELECT * FROM tw_cms_article WHERE id='17' [explain type: const | rows: 1]
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      11. #10 /data/htdocs/222_lanhui/twcms/kongphp/db/db.interface.php
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      26. #25 /data/htdocs/222_lanhui/twcms/runtime/twcms_model/cms_content_views_model.class.php
      27. #26 /data/htdocs/222_lanhui/twcms/kongphp/tpl/sys_trace.php