Big ball of mud: a system with no recognizable structure.
大泥球(Big ballof mud)：系统的结构不清晰。
The full series are structure of trunnion mounted ball.
全系列采用固定球结构。
In general, WILLIAMSONs trunnion ball valve features the front ball sealing design structure.
威廉姆森固定球阀一般采用球前阀座密封结构。
Q41 series factory ball type, for two off-type structure.
本厂球系列为Q41型，为对开二片式结构型式。
Q41 series factory ball type, for two off-type structure.
本厂球系列为Q41型，为对开二片式结构型式。
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