It has a bottom and a frame, sometimes open at the top.
它有一个底和一个框架，有时顶部敞开。
Advantage: frame can open, make replacing hammer head, back plate and lining board work easier.
优势：机架可以开启，使得更换锤头、反击板及衬板的工作更加简便易行。
No open reading frame encoding TNP1/TNPA-like DNA binding protein were found in this element.
该因子没有能够编码类似TNP1/TNPA的DNA结合蛋白的开读框。
No open reading frame encoding TNP1/TNPA-like DNA binding protein were found in this element.
该因子没有能够编码类似TNP1/TNPA的DNA结合蛋白的开读框。
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