嫩草影院,欧美肥胖老妇做爰,《色戒》hd在线观看,女医生的色诱2,新潘金莲电影

验(yan)(yan)收标(biao)准(zhun)外(wai)观(guan)检查。1．管(guan)道走线要横平竖直。管(guan)道均固定(ding)牢固。2．管(guan)道外(wai)表面无明显破(po)损。3．各(ge)个管(guan)阀(fa)件无明显破(po)损。系统(tong)(tong)(tong)耐压(ya)(ya)(ya)实验(yan)(yan)。如果(guo)(guo)管(guan)道充(chong)入(ru)压(ya)(ya)(ya)力(li)后发(fa)生形变(bian)（如膨(peng)胀、扭曲、鼓泡等(deng)现象）即说明此(ci)系统(tong)(tong)(tong)无法在(zai)此(ci)压(ya)(ya)(ya)力(li)下工作，如果(guo)(guo)长(zhang)时(shi)间在(zai)此(ci)压(ya)(ya)(ya)力(li)下工作，系统(tong)(tong)(tong)会(hui)在(zai)形变(bian)位置爆(bao)裂，造成人员财产(chan)伤害。本实验(yan)(yan)是为了检验(yan)(yan)管(guan)道系统(tong)(tong)(tong)耐压(ya)(ya)(ya)性(xing)(xing)能的(de)好(hao)坏(huai)，确(que)保系统(tong)(tong)(tong)的(de)安全可靠性(xing)(xing)。为了确(que)保实验(yan)(yan)过(guo)程(cheng)中不污染系统(tong)(tong)(tong)故应使用高纯(chun)氮气作为实验(yan)(yan)气体。实验(yan)(yan)方法：系统(tong)(tong)(tong)内充(chong)入(ru)高纯(chun)氮气至0.8Mpa。关(guan)闭所有阀(fa)门。经过(guo)24小时(shi)后系统(tong)(tong)(tong)不得有任何形变(bian)产(chan)生。气密性(xing)(xing)实