master black control
常見例句
- Core identification:identified by insulating color difference, master core red, light blue, and white; ground wire black, and the control wire should be printed with no.
線芯識(shí)別：采用絕緣分色識(shí)別，主線芯紅、淺藍(lán)、白。地線黑色，控制線打號(hào)碼。
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