| 1. | Duplication of bands in this region is also shown by trifluoropropyne and perfluoro2-butene .
三氟丙炔和全氟丁烯-2在这个区域也出现双重谱带。 |
| 2. | Butanes and butenes can be maintained in the liquid states at ambient temperature under quite moderate pressure .
在适当的大气压力及常温下，丁烷和丁烯均可保持液体状态。 |
| 3. | To illustrate some of the features of the equilibrium phenomenon, let us look at the reaction in which cyclobutene is isomerized to 1.3-butadiene .
为了说明平衡现象，让我们看一下环丁烯异构成13一丁二烯的反应。 |
| 4. | Pib . polyisobuthylene roofing felt with backing ; requirements
带衬料的聚异丁烯 |
| 5. | Specification for large diameter polybutylene plastic pipe
大直径聚丁烯塑料管规范 |
| 6. | Polybutylene thermoplastic thin - wall drip irrigation tubing
聚丁烯热塑性薄壁滴灌管 |
| 7. | Poly vinylacetate emulsion adhesives for woods
木材用聚醋酸丁烯酯乳胶粘合剂 |
| 8. | Iir . isobutene - isoprene rubber - evaluation procedures
异丁烯异戊二烯橡胶 |
| 9. | Test method for butylene analysis by gas chromatography
用气相色谱法分析丁烯的试验方法 |
| 10. | Acidic resin - catalyzed synthesis of benzylidene acetone
酸性树脂催化合成苯丁烯酮的研究 |
