久久精品aⅴ无码中文字字幕重口,蜜桃久久久电影,欧美最猛,日韩天天射

鍛鋼“Y”型自密封截止閥

密封鍛鋼截止閥|鍛鋼自密封截止閥class800Lb

鍛鋼Ｙ型截止閥class800lbDN80 150

鍛鋼自密封截止閥class900Lb～2500lbDN50 65

內(nèi)螺紋與承插焊鍛鋼截止閥class800lb-1500lbDN65 125

國標(biāo)截止閥DN15 25 35 40

燃?xì)饨刂归y|燃?xì)鈱Ｓ媒刂归y

鋼制截止閥DN400

外螺紋截止閥DN450

抗生素截止閥DN350

襯氟截止閥DN300

柱塞截止閥DN200 250

氧氣專用截止閥DN250 300

鋼制截止閥1DN125 35 50 60

J41H-100高壓截止閥

水封截止閥DN80 100

截止閥DN100 125

高溫高壓電站截止閥|電站截止閥|高溫截止閥

儀表針形截止閥DN150 250 300

波紋管截止閥DN40 DN50 DN65 DN80

柱塞截止閥DN200 DN250

J41YH-40截止閥DN125 DN150

J61H(Y)美標(biāo)電站截止閥

J41H-100高壓截止閥|J41H截止閥|高壓截止閥