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HH44X、HH44T、HH44H型PN10～PN25微阻緩閉止回閥
DHH44X-10C、DHH44X-16C、DHH44X-25型蝶式微阻緩閉消聲止回閥
SNH44Fs型PN10、PN16襯里旋啟式止回閥
H44TC-10C、H44TC-16C型旋啟式陶瓷止回閥
HC44X-10C、HC44X-16C型橡膠瓣逆止回閥
HD43X型PN10～PN25緩閉、緩沖蝶式止回閥
H42N-25、H42N-40型立式止回閥
H42H-25型升降立式止回閥
RH42F-25型燃?xì)饬⑹缴凳街够亻y
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