Well drilling Small toothpdc drill bit Rapid drilling.Suitable for limestone, dolomite, mudstone, sandstone, diamond composite sheet, fast drilling speed, no water blocking bit pdc civil engineering drill bit.
Xiamen Freet Fluid Control Co., Ltd. manufactures the flange eccentric resilient butterfly valve which is applied for oil, gas, and petrochemical plants, for regulating and shut-off services.The features of the resilient seated butterfly valve as follows: