graywacke,greywacke是什么意思

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用法例句

It is revealed that the room temperature compressive strength of no-bake sand is reduced by adding the magnesium-containing modifier; the humidity resistance is improved effectively when the amount of the magnesium-containing modifier is appropriate.

通过向传统的铝磷酸盐粘结剂中加入含镁改性剂和含硼改性剂,研究了改性剂对铝磷酸盐自硬砂性能的影响。

In this paper, a new craft of organic ester-sodium silicate self-hardening sand was used owing to shortage of traditional technology in which red mire organic ester-sodium silicate self-hardening sand was used originally.

针对赤泥水玻璃自硬砂传统工艺的不足,改用有机酯水玻璃自硬砂新工艺,通过工艺试验,确定了有机酯水玻璃自硬砂的生产工艺,经过试生产之后,已经在球铁和铸铁件上应用,取得了成功,获得了满意的效果。

The collapsibility of self-hardening sand is improved by modified silicate sodium.

采用改性水玻璃改善自硬砂溃散性的试验研究表明,改性水玻璃—酯自硬砂溃散性良好,再配以QM附加物,自硬砂残留抗压强度进一步降低,在800℃时残留强度小于0。

The electric spark truing of superhard grinding wheels with metal bond are carried out using a home made ELID special pulse power supply.

采用自行研制的ELID磨削专用脉冲电源对金属基结合剂超硬砂轮进行电火花整形 ,分析了不同电火花整形方式的电路原理及整形效果 ,并对砂轮的电火花整形机理及整形效率进行了研究。

The aluminum phosphate foundry inorganic binder for heat cured sand was compounded and modified by joining different inorganic substance.

结果表明:一种铝镁硼复合磷酸盐铸造无机粘结剂具有良好的综合性能,该粘结剂的稳定性可达10个月,其热硬砂型(芯)具有较好的溃散性,较高的干强度,且在流动空气和高湿度下均有较好的抗吸湿性。

2 core and changing the no-bake sand core to oil sand core.

通过重新设计2#芯子的工艺,将原来的自硬砂芯改为油砂芯,节约了芯子成本。