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buna n.【化學】(德國制)布納(橡膠),丁(二烯)鈉(聚)橡...

buna-n

G . przewalskii migrates to rivers for reproduction from may to august , and the main reproduction sites are the three rivers of shaliu river , buna river and heima river 青海湖裸鯉在5 8月洄游到河流中繁殖,沙柳河、布哈河和黑馬河3條河流為其主要產卵場。

Buna - n rubber 丁晴橡膠

Nitrile rubber buna n 丁晴橡膠

Ten thousand desperate fighting men, with their backs to the sea, held the final perimeter at buna . 一萬名殊死抵抗的士兵,背海作戰,在布納守住了最后一道防線。