In a fourth aspect of {TAIL ~ the present invention}, in addition to the first aspect, the gate is connected to a portion of the groove, i.e., the portion not forming {HEAD ~ a sealing surface} of the seal 
In a fourth aspect of { TAIL ~ the present invention } , in addition to the first aspect , the gate is connected to a portion of the groove , i.e. , the portion not forming { HEAD ~ a sealing surface } of the seal
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