The advantage of stopcock used as pitch valve;2. The results showed that the failure of stopcock was corrosive wear and abrasive .

采用金相顯微鏡和掃描電鏡對在堿性介質(zhì)中發(fā)生泄漏的不銹鋼旋塞閥進(jìn)行了宏微觀形貌和金相組織分析人人操人人人；并采用光電直讀光譜儀http://zhcy.com、EDS91中文字幕国产、紅外碳硫分析儀和NHO分析儀對旋塞閥材質(zhì)和表面沉積物進(jìn)行了系統(tǒng)的表征分析亚洲色图偷。

B. In order to further reduce the stopcock of the hoisting force to resist, commonly used methods to reduce cocks in diameter, so plug valves usually rectangular flow channel, this method in reducing the torque plug valves headstock the same time, increases the stopcock of the fluid resistance C.

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Analyse geometry warp between faucet body of stopcock and its plug becarse processing method and technics was analyzed;several methods of eliminating cone surface processing warp were Introduced and the best sealing effect was achieved.

分析了旋塞閥旋塞體與塞子錐面因加工方法與工藝不當(dāng)而產(chǎn)生的幾何偏差，給出了消除錐面加工產(chǎn)生偏差的幾種方法高清在线午夜日韩视频观看。

This valve's spring support structure, has overcome the traditional stopcock leak-proof energy balance, and easy to rust away the flaw, the alone biased seal design, compared the traditional stopcock to reduce the operation pitch of strand greatly, and maximum limit reduced the packing surface attrition, lengthened valve's service life.

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If the alarm check cocks closed, the alarm is still sound, it should check whether the verification cock tightly closed, in the alarm valve annular tank whether the accumulation of obstacles, alarm valve under the rubber flap is aging or wrinkles.

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From the high-pressure oil-nozzle high-pressure injection of seal oil, a high-pressure seal around the cock ring, that is, cone valve and cocks, a layer of oil film between the sealing surface, both can be closed lubrication, open and close easily.

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The host produces: The wedge type gate valve, the bright pole coal gas gate valve, the gate valve, the electrodynamic balance-like double damper plate gate valve, the box thread gate valve, the bright pole underground gate valve, the electrically operated dark pole wedge type gate valve, seals the gate valve, the knife gate valve, the cut-off valve, the box thread cut-off valve (Japanese-style, Soviet type), to turn on lathe softly opens the type check valve, to risefall the check valve, the noise elimination check valve, to clamp the small dish shape check valve, the vertical check valve, to stand lies the dual purpose check valve, the small dish shape by-pass valve, the by-pass valve, the stopcock, the Three Contacts stopcock, the plunger valve, the ball valve, the flange reed valve.

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Move the high side hose to test cock No. 4, low side hose to test cock No. 3 and open both test cock No.

Step 7 將高端軟管移到測試旋塞4號上，低端軟管移到測試旋塞3號上精品视频只有这里有，然后開啟測試旋塞3號和4號一级A爱在线。

Move the high side hose to test cock No. 4, low side hose to test cock No. 3 and open both test cock No.

Step 7 將高端軟管轉(zhuǎn)移到測試旋塞4號，低端軟管轉(zhuǎn)移到測試旋塞3號久久精品国产99精品九九，開啟兩個(gè)測試旋塞3號和4號婷婷五月国产精品一区二区。

Move the high side hose to test cock No. 4, low side hose to test cock No. 3 and open both test cock No.

Step 7 將高端軟管移到測試旋塞4號av中字在线网站，低端軟管移到測試旋塞3號，開啟測試旋塞3號和4號综合天天干。