支撑孔（Supported hole）： 支撑孔 有镀层 非支撑孔（Un-supported hole） 非支撑孔 无镀层 电路安全距离（Electrical clearance）：不连通的非绝缘导体之...
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非支撑孔 [机] unsupported hole ; Holes Unsupported ; u u orted hole
多孔支撑层 microporous support
多孔支撑管 porous tubular support
支撑盘孔销式输出机构 W-output mechanism by pin-hole
引出孔及支撑板 pipe opening and support plate
在拍板上有手指支撑孔，供手指伸入支撑固定用。
Finger support holes are arranged on the bat board, which can be used for the fingers for extending, supporting and fixing.
整体铸角延伸至侧板提供额外强度支撑，同时侧门孔和较宽的圆柱槽沟确保安装和拆卸的简便。
Integrated corner casting with extended side plate lamination provides extra support whilst the side access holes and wide cylinder slot ensures easy fitting and removal.
尾架主要用来安装后顶尖，以支撑较长工件，也可安装钻头、铰刀等进行孔加工。
The frame is mainly used to after installation, to support a top attractions, also can install a bit, reamer hole processing, etc.
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