1. What's the type number? 
   这是什么机型？
2. type genus of the family Mytilidae: smooth-shelled marine mussels. 
   贻贝科的模式属；一种外壳光滑的海洋贝类。
3. A smooth block of wood used to level a form of type. 
   平版木用来使版面的形式平整的光洁木块
4. type genus of Septobasidiaceae: smooth shelf fungi usually having a well-developed sometimes thick-walled hypobasidium. 
   隔担耳属的模式属；通常具有发育良好的有时为壁厚的下担子光滑隔板真菌。
5. type genus of the Rhyniaceae; small leafless dichotomously branching fossil plants with terminal sporangia and smooth branching rhizomes. 
   鹿角蕨科的模式属；小而无叶的二叉分枝的化石植物，孢子囊顶生，根状茎光滑，有分枝。

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