它是金屬材料的重要性能指標(biāo)之一。一般硬度越高，耐磨性越好。常用的硬度指標(biāo)有布氏硬度、洛氏硬度和維氏硬度。布氏硬度（HB）以一定的載荷（一般3kg）把一定大小（直徑一般為1mm）的淬硬鋼球壓入材料表面，保持一段時間，去載后，負荷與其壓痕面積之比值，即為布氏硬度值（HB）。洛氏硬度（HR）當(dāng)HB45或者試樣過小時，不能采用布氏硬度試驗而改用洛氏硬度計量。它是用一個頂角12°的金剛石圓錐體或直徑為1.53.18mm的鋼球，在一定載荷下壓入被測材料表面，由壓痕的深度求出材料的硬度。
執(zhí)行器IC20-30Q3T芯科技，芯創(chuàng)新；86060748
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0191052110 VOLTMETER
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0192207111 Y-steel bearing UCP 214
0192230107 Blind Plug
BALLUFF BTL-5-R1-M0610-Z-MA000--S135-E4 (Surplus New not in factory packaging)
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BALLUFF BMOA66RM-X63-1 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BIS-C-310-05 (Surplus New not in factory packaging)
BALLUFF C49BPE00PY050M CONNECTOR *NEW IN ORIGINAL PACKAGE*
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BALLUFF BNI-PNT-104-105-Z015 (Surplus New In factory packaging)
BALLUFF BNS-519-D04-L12-062-10 LIMIT SWITCH BNS519D04L1206210
BALLUFF BTL5-A11-M0305-B-SU147-S32 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-Q08ZE-POC20B-BV06 (Surplus New In factory packaging)
BALLUFF BNS-519-101-1-WS-067 (Used, Cleaned, Tested 2 year warranty)
FREE 2 YR WARRANTY FREE US SHIPPING ON ORDERS OVER $25
BALLUFF BNS-519-101-1-WS-067 (Used, Cleaned, Tested 2 year warranty)
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BALLUFF BLE-S5-1-FS-15 (Surplus New In factory packaging)
Balluff BES-516-325-BO-C Proximity Switch BES-516-325-B0-C - New No Box
Balluff BES-516-325-BO-C Proximity Switch BES-516-325-B0-C - New No Box
BALLUFF BES-516-207-BO-E-03 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BES-516-207-BO-E-03 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BTL5-A11-M0254-Z-S32 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BNS-519-FR-60-101 (Surplus New not in factory packaging)
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BALLUFF BES-516-359-BO-C-03 (Surplus New not in factory packaging)
燃氣壓力開關(guān)，DG40VC1-5WG/B，75454579
燃氣壓力開關(guān)，DG17VC1-6W/B，75455241
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燃氣壓力開關(guān)，DG110VC1-6W/B，75455245
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SO2進入大氣后，若大氣干燥清潔，可停留～2星期。經(jīng)高煙囪排放后，在.5km高空風(fēng)的影響下，24h之后會有5%以上超越7km之外，6h后，能擴散到km之外?？茖W(xué)家曾估計過，我國大部分省份排放的SO2，有一半以干濕沉降方式沉降在本省范圍，有2～3%沉降到周圍省份，其它則沉降到較遠的省份。大城市則更為突出，它們排放的SO2，僅2%左右沉降在本市內(nèi)，8%則被傳輸?shù)狡渌胤饺チ?。高煙囪排放含硫煙氣大大減輕了燃煤發(fā)電廠周邊地區(qū)的大氣SO2落地濃度，較為有效地改善了燃煤發(fā)電廠周邊地區(qū)的大氣環(huán)境質(zhì)量。
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