... 保持密封 keep tight 产油、气的井；看守人；永磁衔铁；保位物；锁紧螺母；定位螺钉；门栓 keeper 保管；保持；供养；一致 keeping ...
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... 保持密封 retaining seal 延迟(光程)；减速 retardation 延迟(光程)；减速 retardation ...
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短语
保持容器密封
Keep Container Closed
;
Keep Container Tightly Closed
密封保持器板
seal retainer plate
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