瓣封 的英文怎麼說

In the event that a boiler does shut down the stop - check must prevent backflow into the boiler, the weight of the disc and dash pot piston, through the force of gravity, promote rapid sealing so steam and condensate cannot backflow into the boiler even at low pressures

如果鍋爐沒有關閉截止止回閥，則必須防止迴流到鍋爐上，閥瓣壓鐵和緩沖活塞，在重力的作用下，能夠迅速實現密封，使得蒸汽和冷凝水即使在低壓下也不會迴流到鍋爐里。

Did you like the hibiscus petals i glued to the envelope i sent you

你喜歡我粘在信封上寄來的芙蓉花瓣嗎

The bulk of the mass is spread out, forcing stars to trace a spirograph - like rosette : an ellipse that does not close on itself but gets offset each time the star completes one revolution [ see box at right ]

整體質量分散開來，迫使恆星運行方式如旋轉繪圖盤所畫出的花瓣狀螺線：那不是每圈都會封閉起來的橢圓，恆星繞行一周后，軌道並不接合便又重新開始下一周的運動（見右方整理軌道秩序） 。

The thirty - four species of the sea urchins belong to 7 order, 17 families and 28 genera. the following is the name list, those with an asterisk are the species recorded for the first time in china. order cidaroida family cidaridae * goniocidaris biserialis ( d6derlein ) * stylocidaris bracteata ( a. agassiz ) * stylocidaris ryukyuensis shigei * stereocidaris indica philippinensis mortensen * rhopalocidaris gracilis doderlein order lepidocentroida family echinothuridae * phormosoma bursarium ( a. agassiz ) araeosoma owstoni mortensen asthenosoma ijimai yoshiwara order stirodonta family phymosomatidae glyptocidaris crenularis a. agassiz family arbaciidae * coelopleurus maculata a. agassiz et h. l. clark * coelopleurus undulatus mortensen order aulodonta family diadematidae chaetodiademajaponicum mortensen family pedinidae * caenopedina mirabilis ( d6derlein ) order camarodonta family temnopledridae temnopleurus hardwickii ( gray ) temnopleurus toreumaticus ( leske ) temnopleurus reevesii ( gray ) temnopleurus apodus ( a. agassiz et h. l. clark ) temnotrema sculptum ( a. agassiz ) temnotrema reticulatum mortensen * microcyphus olivaceus ( d6derlein ) * prionechinus forbesianus ( a. agassiz ) family strongylocentrotidae strongylocentrotus nudus ( a. agassiz ) hemicentrotus pulcherrimus ( a. agassiz ) family echinometridae anthocidaris crassispina ( a. agassiz ) order clypeasteroida family clypeasteridae clypeaster virescens doderlein family laganidae * peronellapellucida d5derlein family scutellidae * scaphechinus mirabilis a. agassiz sinaechinocyamus planus liao family fibulariidae fibularia acuta yoshiwara order spatangoida family loveniidae - lovenia triforis koehler echinocardium cordatum ( pennant ) family schizasteridae schizaster lacunosus ( linnaeus ) family brissidae * gymnopataqus magnus ( a. agassiz & h. l. clark ) family spatangidae * spatangus luetkeni a. agassiz among the species reported, the following species call for notes or simple descriptions

本文根據th . mortensen （ 1928 - 1955 ）海膽專著（ amonographoftheechinoidea ）中的主要分類依據，將海膽綱分為8個目： 1 ）頭帕目（ cidaroidea ）有齒器，圍肛部在頂系內，圍口部有步帶板和間步帶板，大棘很大，有外皮層，無球棘； 2 ）鱗棘目（ lepidocentroida ）有齒器，圍肛部在頂系內，圍口部僅有步帶板，大棘不很大，無外皮層，有球棘； 3 ）脊齒目（ stirodonta ）有齒器，圍肛部在頂系內，齒器的齒有脊，橈骨片在齒上方不相接，顎孔開放； 4 ）管齒目（ aulodonta ）齒器的齒無脊，圍肛部在頂系內； 5 ）拱齒目（ camarodonta ）有齒器，圍肛部在頂系內，齒器的齒有脊，橈骨片在齒上方相接，顎孔封閉； 6 ）全雕目（ holectypoida ）有齒器，但不發達或完全被吸收，圍肛部在頂系外，步帶不形成瓣狀和葉鰓； 7 ） ?形目（ clypeasteroida ）齒器發達，圍肛部在頂系外，步帶形成瓣狀，無葉鰓； 8 ）蝟團目（ spatangoida ）無齒器，圍肛部在頂系外，葉鰓發達，步帶形成瓣狀。

In the nibco design stop - checks, you will note that the disc is mounted to permit the disc to settle into the seat area for positive sealing in case there is any misalignment due to assembly or uneven heat expansion

從美國尼伯科的截止止回閥結構設計中，人們可能會注意到，萬一出現由於組裝問題或不穩定的熱膨脹導致的中心線錯位，所安裝的閥瓣能夠適應閥座區域的要求主動調整密封。

Drop tight seating is accomplished over the full pressure range because a slight clearance at the pivot pin assures complete seating between the disc ring and body ring

由於在樞軸銷上的空隙很小，所以在整個壓力范圍內都可以實現漏斗形緊密閥座密封，確保閥瓣環和閥體環之間的閥座密封的完整性。

Series 415 steam safety valves feature a stainless steel spring, a top guided stem and non - stick teflon ? disc to metal seating to assure positive shutoff

系列415蒸汽安全閥配置不銹鋼彈簧，一個頂部引導閥桿和不卡住特氟隆閥瓣對金屬閥座密封，確保絕對關閉。

Disc stem nut : disc stem ring connects the disc to the stem, permitting the disc to swivel and aid in securing tight seating for trouble - free service

閥瓣閥桿螺母：閥瓣閥桿環將閥瓣連接到閥桿上，使得閥瓣能夠旋轉，並有助於保證閥座地緊密密封和無故障運行。

Seat rings : seat rings are seal welded to eliminate leak path behind rings and for long trouble - free service. the surfaces are precision ground to fit accurately with the disc

閥座環：閥座環境過密封焊接，可消除環后的泄漏通道，延長無故障工作的壽命。表面經過精密研磨以精確配置閥瓣。

Disc has a differential angle front the seat to provide a line contact for maximum sealing

這類閥瓣具有不同的角度面對閥座，因此具有線接觸作用，從而實現最大限度的密封。

The resiliency of the seal allows the valve body and disc to contract or expand, without the risk of jamming due to temperature fluctuations

密封的彈性使得閥門閥體和閥瓣能夠接觸或擴張，避免了由於溫度波動而產生堵塞的危險。

The sealing disk may be removed, if necessary, by removing the screws connecting the keeper plate to the clapper

如果有必要的話，可以通過拆卸將閥瓣連接到承座壓板的螺絲來拆卸密封閥瓣。

Gate valves are offered in two designs : parallel disc and flexible wedge. parallel disc are position seated ; flexible wedge are torque seated when closing

我們提供的閘閥的結構形式具有兩種：平行閥瓣和彈性楔形閘板。平行閥瓣為定位閥座密封；彈性楔形閘板在關閉時則是扭矩閥座密封。

As flow begins, the plates open in response to a resultant force ( f ) which acts as the center of the sealed surface area

當流體開始流動時，閥瓣在作用在密封表面中心的合力（ f ）作用下開啟。

Spring loaded discs help affect a tight seal in low differential pressure services

彈簧負載閥瓣有助於在壓差較低的應用環境中產生更緊的密封。

The v - shaped nose guard helps to streamline the flow and protects the upstream circumference of the laminated disc - seal

這種v形鼻狀保護裝置有助於形成流線型的流體，從而保護疊層閥瓣密封的上游周邊。

Remove the patient ' s upper and lower dentures, if present, immediately before laryngoscopy. re - insert the patient ' s dentures to improve the mask seal if bagvalve ? mask ventilation is required

插入喉鏡前，如佩戴假牙者，應先取下全部假牙。若使用球瓣面罩通氣時，則需重新戴上假牙以保持面罩的密封性。

The movements of check valve located at valve valve seal on thebutterfly valve seat surface

升降式止回閥的閥瓣座落位於閥體上閥座密封面上。

Use " w " to express seat facing ring material which process directly by valve body, when seat and discsealing material are different, use low hardness material symbol to express ( except diaphragm valve )

注：由閥體直接加工閥座密封面材料用" w "表示，當閥座和閥瓣（閘板）密封材料不同時，用低硬試驗材料代號（除隔膜閥外） 。

This prevents rubbing of the seal surface prior to normal plate opening, eliminating wear

這就避免了舊型常規閥門在閥瓣開啟時所出現的密封表面摩擦現象，消除了部件的磨損。