- bit matrix
- 钻头: boring crown; bore bit; dril ...
- 钻头铸嵌基体: cast matrix
- 基体: basal body; basal corpuscle; generatrix; gleba; groundmass; kinetosome; matrix; mer; palasome; substrate; substratum
- 假头基: basic capituli; kragen
- 头基毛: capitular seta
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