valveman阀门操作者
valven.瓣膜;真空管;阀门;电子管
valve-seat face气门面
valve packing nut阀填密螺母
valve chest gland阀柜压盖
valves of Tulpius[医] 塔耳皮厄斯氏瓣, 回盲瓣
valve homogenizer高压阀式均质机
valve head margin气门头边缘厚度
valve insert seat气门镶座
valve spring seat气门弹簧座,阀簧座
valve seat holder阀座托架
valve train noise配气机构噪声