本发明还涉及用有效量的至少一种式（I）二硫杂环戊烷化合物使至少一种二苯甲酰甲烷衍生物对辐射光稳定化的方法。
This invention also relates to a light stabilizing method for at least one dibenzoylmethane derivative with effective amounts of at least one dithiolane compound (I).
本文还介绍了国内外天然气瓶的轻质化动向，以及开发以近临界流体凝析油戊烷——天然气体系贮存天然气的灌装线的可行性。
The current tendency for gas bottle lightening and the possibility of developing the natural gas filling line by the new storage method were introduced as well.
前言：描述了球形测试装置的结构，测试原理和测试步骤，并测试了七氟丙烷对甲烷和戊烷的惰化体积分数。
The essay article introduces the structure of the inerting apparatus, the test principle, the test procedure and the determination of inerting concentration.
环戊烯与氢卤素加成反应制备卤代环戊烷，工艺流程简单，原料经济，收率高，易实现工业化。
Preparing cyclopentane halide by the addition reaction of cyclopentene with hydrogen halide is a simplified process with a high yield and can be used in a large scale.
考察了所制备的催化剂上常温下正戊烷异构化反应的活性和选择性。
The catalytic activity and selectivity of the catalysts for n-pentane isomerization at ambient temperature were investigated.
本文还介绍了国内外天然气瓶的轻质化动向，以及开发以近临界流体凝析油戊烷——天然气体系贮存天然气的灌装线的可行性。
The current tendency for gas bottle lightening and the possibility of developing the natural gas filling line by the new storage method we…
西司他丁钠的合成以乙酰乙酸乙酯和1-溴-5-氯戊烷为原料，经活性亚甲基烃化、成肟和水解3步反应得7-氯-2-氧庚酸乙酯；
The synthesis of Cilastatin sodium started from ethyl acetoacetate and 1-bromo-5-chloropentane, through 3 steps to produce ethyl 7-chloro-2-oxoheptanoate;
西司他丁钠的合成以乙酰乙酸乙酯和1-溴-5-氯戊烷为原料，经活性亚甲基烃化、成肟和水解3步反应得7-氯-2-氧庚酸乙酯；
The synthesis of Cilastatin sodium started from ethyl acetoacetate and 1-bromo-5-chloropentane, through 3 steps to produce ethyl 7-chloro-2-oxoheptanoate;
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