婷婷色青基地_激情艹逼_日日干夜夜草_狠狠色丁香久久综合频道_久久精品国产第一区二区三区

Cryogenic globe valve

Cryogenic gate valve

Water Seal Gate Valves

Throttling type globe valve

‎Sulfur resistant gate valve

High temperature and high pressure gate valve(Design per API/JB )

Electric globe valve

High temperature and high pressure swing check valve

球閥