... Pump Head Structure 过泵头结构 head-tail structure 头尾结构 head driven phrase structure 中心语驱动词组结构 ...
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The IR spectra indicate that poly 2 aminopyridine has head to tail structure.
由红外光谱可知，聚- 2 -氨基吡啶具有头-尾相接的结构。
The products with higher conductivity are mainly 1, 4-connected head-to-tail chain structure, both benzenoid and quinoid units exist in the polymer chain.
具有较高电导的产物的链结构主要是1,4 -连接的头尾结构，链上同时存在苯式及醌式两种结构单元。
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