The formula of the extrusion stock which can resist transformer oil was studied so as to solve the problems such as the unsteady performance of the vulcanizate adaptable transformer,the incompetent properties of 45~# transformer oil resistant and the unsatisfied extrusion demand of the stock.
针对变压器用胶料硫化胶性能不稳定、耐45#变压器油性能不达标及混炼胶料不能满足后续压出工艺生产要求等问题,研制了一种以软丁腈N41为主体材料,采用AB型并用促进剂、4010NA为防老剂、结构度较高的N539碳黑为补强填充剂的耐45#变压器油的压出胶料新配方。
This paper has presented a new type of ventilation,namely,forced-out ventilation.
文章提出一种新的布置方式,即压出式。
At the same time,the improving measures of cutter head,pneumatically coming out of soil,reducing friction and so on were introduced emphatically.
结合具体工程实例介绍了气动(捶击式)小口径顶管技术的原理及施工工艺,分析了气动小口径顶管施工管材的选择问题,着重介绍了切土头、气压出土、减小摩擦力等技术的改进措施。