- 丁(nail; spike)
A nail driven straight down looks like the character for nail or the fourth of the heavenly stems.
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butadiene C4H6
Butadiene is an important chemical raw material.
biethylene
butadiene C4H6
Butadiene is an important chemical raw material.
biethylene
A nail driven straight down looks like the character for nail or the fourth of the heavenly stems.
Two parallel horizontal strokes symbolize the number two.
A nail driven straight down looks like the character for nail or the fourth of the heavenly stems.
Two parallel horizontal strokes symbolize the number two.
butadiene C4H6
butadiene C4H6
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