channel layer沟道: channel层: I storey; tier; stratum波道层: ducting layer通道层: kbit/spdh; pq pdh path layer pdhh赤道层线: equationial layer line下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:沟道层，即可在微信中查询翻译
