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華德液控單向閥部分型號：

SL10PA1-40B/  SL10PA2-40B/  SL10PA3-40B/  SL10PA4-40B/
SL30PB2-40B北京華德液控單向閥***
SL10PB1-40B/  SL10PB2-40B/  SL10PB3-40B/  SL10PB4-40B/

SL20PA1-40B/  SL20PA2-40B/  SL20PA3-40B/  SL20PA4-40B/

SL20PB1-40B/  SL20PB2-40B/  SL20PB3-40B/  SL20PB4-40B/

SL30PA1-40B/  SL30PA2-40B/  SL30PA3-40B/  SL30PA4-40B/

SL30PB1-40B/  SL30PB2-40B/  SL30PB3-40B/  SL30PB4-40B/

SL10GA1-40B/  SL10GA2-40B/  SL10GA3-40B/  SL10GA4-40B/
SL30PB2-40B北京華德液控單向閥***
SL10GB1-40B/  SL10GB2-40B/  SL10GB3-40B/  SL10GB4-40B/

SL20GA1-40B/  SL20GA2-40B/  SL20GA3-40B/  SL20GA4-40B/