克孜勒蘇柯爾克孜SOP for plate flat welding flange
克孜勒蘇柯爾克孜Blind flange bl
克孜勒蘇柯爾克孜Threaded flange tr
克孜勒蘇柯爾克孜Flat welding flange with neck
克孜勒蘇柯爾克孜Neck butt welding flange
