twist-off lug cap
... back twist pay-off 退扭放线 Twist-off lug Cap 凸耳盖 ; 快旋盖 deep twist-off can 深型四旋盖 ...
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... blind-off cap 封闭盖 off lug Cap 凸耳盖 ; 快旋盖 Take Off Your Cap 取下你帽子 ...
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清洗：检查或更换磨损的阀门阀瓣，断开控制管线，采用钝工具和锤打阀盖凸耳从阀体上旋下阀盖。
To CLEAN: Inspect or replace worn valve disc, disconnect control pipe and unscrew bonnet from valve body using blunt tool and hammer on bonnet lugs.
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