standard sand

Production silicon carbide blocks, sand particle size, powder three series over 100 standard products.

年生产碳化硅块 、 粒度砂 、 微粉三大系列100多个规格产品.

The reagent dosage standard in the granule analysis test of sand Liquefaction

砂土液化中颗粒分析试验试剂用量标准的研究

Using mechanical dynamic triaxial test apparatus and electro-hydraulic dynamic triaxial test apparatus, liquefaction tests of a saturated standard sand were conducted in order to compare the effects of apparatus type, and sample size on dynamic strength.

用机械式及液压式振动三轴仪进行标准砂的液化试验，以比较仪器型式对动强度的影响；还比较了试样尺寸的影响。

Wear tests of 45 steel, as standard sample, and D8 、 D9 wear-resisting surfacing materials were carried out by sand slurry abrasion tester with vertical multi-clamps under concrete condition.

在多头立式磨损试验机上，以45钢（正火态）作为标准试样，选用D8、D9两种耐磨堆焊材料，在混凝土工况条件下进行了磨损试验。

The green sand ingredient and compactability fast testing unit, made up of an automatic sampling machine and a testing slave, is developed to prepare a standard sand specimen and test conductive parameters automatically.

研制了由自动制样机构和测试下位机构成的湿型砂组分及紧实率快速测试单元，可完成标准砂样的制作和紧实率、导电参数的自动测量。

Oil extraction wastewater treated by oil removal-chemical break-emulsification coagulation-sand filtration process, removal rate of COD oil could reach above 85% 95% respectively, COD in purified water could not attain to national standard of discharge, but oil concentration could attain to national standard of discharge;

经过隔油-破乳絮凝-砂滤处理后，COD和油去除率分别达到85%和95%以上，COD没有达到排放标准，油达到了排放标准；