护层 meaning in Chinese

sheath

Protective coverings for electric cables - part 1 : general
电缆外护层第1部分:总则
Monitor : composed by 3 equidistant leads and semiconductive electric strip
监视器：内护层外面用半导电带
Colour coating extruder
彩色护层挤出机
Protective coverings for electric cables - part 2 : general protective coverings for cables with metallic sheath
电缆外护层第2部分:金属套电缆通用外护层
Protective coverings for electric cables - part 4 : specific protective coverings for oil - filled cables with lead sheath
电缆外护层第4部分:铅套充油电缆特种外护套

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