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(1) The utility model provides a low-temperature stop valve, wherein a guide sleeve is added at the valve disc, and is fixed by bolts and elastic pads, so as to position and guide the seal of the valve; ;长此以往，对谁都没有好处。Netfilter/iptables (hereinafter referred to as iptables) constitute the packet filtering firewall under Linux platform. Like most Linux software, this packet filtering firewall is free of charge. It can replace expensive commercial firewall solutions and complete the functions of packet filtering, packet redirection and network address translation (NAT).童四季自幼父母离世，带着一双弟妹，承担起了家庭的重担。为更好的补贴家用，四季四处兼差打工，认识了远先百货继承人易奕。在工作的接触中，两人情愫互生。易奕之母杜鹃发现，四季真实身份为福康百货程康生之女，而康生会与四季之母误会分离，全为杜鹃欺骗所致，后康生不得已与带着小易奕的杜鹃商业联姻。为阻止真相败露，杜鹃谎称易奕与四季为同父异母的姐弟。易奕痛苦不堪，为此说谎不爱四季，并与一直喜欢自己的四季妹妹小夏订婚。但在婚礼现场，康生看到小夏与四季之母的照片，追问之下，终于得知真相，四季与康生父女相认，杜鹃为谎言付出了巨大的代价。易奕在得知一切事实之后，也终于体会到四季的自尊与坚强，决心重新追求四季，两人开始了一段新的人生旅程。