研究了无规聚丙烯与天然橡胶并用制备篷布的配方。
A composition for preparing tarpaulin is studied by using a tactic polypropylene and natural rubber.
将叠层橡胶支座和R／C柱的串联机构作为隔震系统的做法在实际工程中已有应用，但至今尚无规范化的设计计算方法。
The serial isolation system consisting of laminated rubber bearing and R/C column has been applied in practical building, but without the corresponding codes for calculation and design yet.
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