n. 丁钠橡胶

[建] 布纳(橡胶), 丁(二烯)钠(聚)橡胶

[ noun ]
made by polymerizing butadiene
<noun.substance>

Buna \Buna\ n. [trademark.]
a synthetic rubber made by copolymerizing butadiene with
another substance such as acrylonitrile or styrene.

Syn: buna-S. [WordNet 1.5]