其中化學成分要求為嚴格，它是判定鋼材質量的主要依據。為了保證線材質量均勻，性能一致，其含碳量波動的范圍應當盡可能少，不僅要求同一澆注批號的碳含量波動小，而且要求同一鋼號的含碳量都相同，以保證同一鋼號的線材質量穩定。另外要限定偏析值保證線材成分及性能均勻。對碳鋼線材而言，含碳量每增加.1％則抗拉強度就相應增加78.4MPa，而延伸率下降4％。所以通常要求同批線材含碳量波動不超過.2％。目前我國標準規定的允許碳含量波動范圍都比較大（注意收集實習廠家的資料）。
執行器IC20-07Q2T芯科技，芯創新；74338596
0190899102 HOSE TERMOPLASTIC.
0191015102 CONTACTOR
0191052110 VOLTMETER
0191059116 Ampere meter
0191085203 CAPACITOR
0191085206 CAPACITOR
0191321104 CLAMP PLAST. D=12 STAUFF
0191418074 SPACING SLEEVE
0191496114 WEDGE
0191561114 INSULATING WASHER
0191574114 INSULATED SLEEVE
0191812101 Cable MKFR
0191812102 Cable MKFR
0191812104 Cable MKFR以質量打造品質，用誠信共贏未來！》
0191812105 Cable MKFR
0191954101 RUBBER HOSE
0192058101 THERMAL COMPOUND
0192108201 SOLENOID VALVE
0192190051 PRESSURE COIL
0192200103 Hose Nipple
0192207111 Y-steel bearing UCP 214
0192230107 Blind Plug
BALLUFF BTL-5-R1-M0610-Z-MA000--S135-E4 (Surplus New not in factory packaging)
BALLUFF BIS-F-450-000-A (Used, Cleaned, Tested 2 year warranty)
BALLUFF BTL2-A11-0100-P-S-32 (Surplus New not in factory packaging)
BALLUFF BMOA66RM-X63-1 (Used, Cleaned, Tested 2 year warranty)
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*
BALLUFF C49BPE00PY050M CONNECTOR *NEW IN ORIGINAL PACKAGE*
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)
BALLUFF BNS-519-101-1-WS-088 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BNS-519-101-1-WS-066 (Used, Cleaned, Tested 2 year warranty)
BALLUFF BNS-519-101-1-WS-066 (Used, Cleaned, Tested 2 year warranty)
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)
BALLUFF BNS-519-FR-60-101 (Surplus New not in factory packaging)
BALLUFF BES-516-359-BO-C-03 (Surplus New not in factory packaging)
燃氣壓力開關，DG40VC1-5WG/B，75454579
燃氣壓力開關，DG17VC1-6W/B，75455241
燃氣壓力開關，DG40VC1-6W/B，75455243
燃氣壓力開關，DG110VC1-6W/B，75455245
燃氣壓力開關，DG300VC1-6W/B，75455246
燃氣壓力開關，DG17VC1-6WG/B，75455247
燃氣壓力開關，DG40VC1-6WG/B，75455249
燃氣壓力開關，DG110VC1-6WG/B，75455251
燃氣壓力開關，DG300VC1-6WG/B，75455252
燃氣壓力開關，DG40VC9-6W/B，75456344
燃氣壓力開關，DG17VC9-6W/B，75456403
燃氣壓力開關，DG60VC9-6W/B，75456404
燃氣壓力開關，DG150VC9-6W/B，75456405
燃氣壓力開關，DG300VC9-6W/B，75456406
燃氣壓力開關，DG40VC9-6WG/B，75457583
燃氣壓力開關，DG500VC1-6W/B，75457730
燃氣壓力開關，DG500VC1-6WG/B，75458957
燃氣壓力開關，DG17VC8D-6S32，84448004
圍護結構傳熱根據《實用供熱空調設計手冊》中的計算方法計算，通過大量計算與其它散熱源相結合，得出此空調冷負荷指標：2676W/m2,熱負荷為272W/m2。從表4可知，風冷熱泵空調整體費用要高于水源熱泵空調，而且風冷熱泵的制冷熱系數隨著外界的溫度不斷的發生變化，從而導致制冷系統運行的不穩定、資源浪費嚴重。而且水源熱泵機組與風冷熱泵機組比，有以下優勢：a)水源為深井水，水體溫度較恒定，機組運行更可靠、穩定，保證了系統性和經濟性，且無須專人維護或操作，運行維護費用極少。
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