在(zai)線(xian)觀看激情無碼成人(ren)AV:常壓人(ren)孔

人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)是指(zhi)用于人(ren)(ren)(ren)(ren)(ren)員進出設(she)備以(yi)便安(an)裝(zhuang)、檢(jian)(jian)(jian)修和(he)(he)(he)安(an)全(quan)檢(jian)(jian)(jian)查(cha)的開孔(kong)(kong)(kong)(kong)(kong)結構(gou)。主(zhu)要(yao)由短(duan)筒節（或(huo)短(duan)管）、法蘭和(he)(he)(he)帶把手的人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋(gai)組成。從安(an)全(quan)檢(jian)(jian)(jian)查(cha)考慮，壓(ya)力容器要(yao)求開設(she)的人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)數及其小尺寸見“檢(jian)(jian)(jian)查(cha)孔(kong)(kong)(kong)(kong)(kong)”。人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)材料有碳鋼和(he)(he)(he)不銹鋼。按受壓(ya)情況人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分(fen)為(wei)(wei)常壓(ya)和(he)(he)(he)受壓(ya)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；按形(xing)狀人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分(fen)為(wei)(wei)圓形(xing)、橢(tuo)圓形(xing)和(he)(he)(he)矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)，矩形(xing)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)僅適用于常壓(ya)設(she)備；按安(an)裝(zhuang)位置人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)分(fen)為(wei)(wei)水平和(he)(he)(he)垂(chui)直(zhi)安(an)裝(zhuang)人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)；人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)蓋(gai)固定方式(shi)有迥(jiong)轉蓋(gai)和(he)(he)(he)吊蓋(gai)；人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)開后(hou)速度有普通式(shi)和(he)(he)(he)快開式(shi)，人(ren)(ren)(ren)(ren)(ren)孔(kong)(kong)(kong)(kong)(kong)結構(gou)和(he)(he)(he)尺寸一般都已(yi)標(biao)準化，可參照(zhao)有關手冊選用或(huo)設(she)計。