merck millipore,默克密理博,XX1002503,铝弹簧夹， 25 mm

whatman,沃特曼,nalgene,耐洁,merck millipore,默克密理愽,sartorius,赛多利斯,pall,颇尔
thermo fisher,赛默飞世尔,GE,MN,macherey-nagel,advantec,wheaton,brand,普兰德,welch,airtech