以上标准和本标准不适用于医用电气设备、发爆器、发爆器试验仪和点火电路试验仪
至于你所提到的"EX2DB4",本人实在是没见过类似你的标准,疑为你误抄了此型号或符号.
常见符号为"EXDⅠ/Ⅱ BT3"
"EX"为通用符号,表示EXPLOSIVE
"D"表示次防爆型式为"隔爆型D".
"Ⅰ"或"Ⅱ"表示电气设备分类,Ⅰ为煤矿用电气设备,Ⅱ为除煤矿外其它爆炸性气体环境用设备.其中,Ⅱ类隔爆型"D”和本质安全型"I”电气设备又分为ⅡA,ⅡB和ⅡC类.
"T3"表示温度组别.

ATOS DKU-1613-00 ATOS SC-PFED-41085
ATOS DKU-1671/WP-X-24DC ATOS SESINO MASTER CATALOG
ATOS DKU-1671-00 ATOS SHLI-50331
ATOS DKU-16716-X-24DC ATOS SHOP TABLE
ATOS DKU-16719-X-24DC ATOS SP-/R-DP-2
ATOS DKU-1671-X-12DC ATOS SP-/R-DP-3
ATOS DKU-1671-X-24DC ATOS SP-/R-DP-6
ATOS DKU-1672-00 ATOS SP-031300-CABLE
ATOS DKU-1672-X-12DC 换向阀 SUN DLDA-MCN-224
阀 SUN DCCF-XXN
阀 SUN CKEB-XBV
阀 SUN NCCB-KAN
阀 SUN PVJA-LDN
溢流阀 SUN RDDA-LDN:s=35.3Bar
溢流阀 SUN RDDA-LSN:8bar,3.5~14bar
平衡阀 SUN CBEA-LIN-ZNV/M
平衡阀 SUN CBEA-LHN-BBA
阀 SUN LPJC-XHN
阀 SUN CVGV-XCN+PAX/S
单向阀 SUN 单向阀CXFA-XBN
单向阀 SUN CXBA-XEV-0GH8
阀 SUN NFDC-LAN-DBA-S
阀 SUN NFDC-LAN-ODK7
阀 SUN FXFA-LAN-35-00LP
阀 SUN PPFB-LWN-0DP7
阀 SUN OFF7-AC GBY
阀 SUN OA97-AC EPB
换向阀 SUN DMDB-SNN
平衡阀 SUN CBIG-LDN
阀 SUN CBEA-LIN-BBY
溢流阀 SUN RPEC-LWN-FBA-S
线圈 SUN 770-224
单向阀 SUN CXHA-XZN-DBM
阀 SUN PBHB-LBV
单向阀 SUN CXBA-XCV
单向阀 SUN XEOA-XXN
单向阀 SUN DWDA-XAV
单向阀 SUN XBOA-XXN
阀 SUN SUN-NG10 KOMPL
直动减压阀 SUN PRFB-LBN
阀 SUN DFDB 8DN
阀 SUN DKFR-XHN
阀 SUN T-8A AND T-9A
阀 SUN RTF-04 1214 ATOS SP-15-AZRA-102100-15F
ATOS DKU-1673/1-00 ATOS SP-15-AZRA-102100-15F/18
ATOS DKU-1673/1-X-12DC ATOS SP-15-AZRAE-102100-15F
ATOS DKU-1673/1-X-24DC ATOS SP-15-AZRT-100100-15F
ATOS DKU-1673-00 ATOS SP-15-AZRT-101200-15F
ATOS DKU-1673-X-12DC ATOS SP-15-AZRTE-100100-15F
ATOS DKU-1673-X-24DC ATOS SP-15-AZRTE-101200-15F
ATOS DKU-1674/8-00 ATOS SP-15-DK-401071
ATOS DKU-1674/8-X-12DC ATOS SP-15-DK-401083
ATOS DKU-1674/8-X-24DC ATOS SP-15-DK-501510H
ATOS DKU-1674/FC-X-24DC ATOS SP-15-DKO-106000F
ATOS DKU-1674-00 ATOS SP-15-DKO-106100F1
ATOS DKU-1674-X-12DC ATOS SP-15-DKO-106100F2
ATOS DKU-1674-X-24DC ATOS SP-15-DKO-106100F3
ATOS DKU-1675-00 ATOS SP-15-DKRZA-404373
ATOS DKU-1675-X-12DC ATOS SP-15-DKU-200061P
ATOS DKU-1675-X-24DC ATOS SP-15-DKU-200071
ATOS DKU-1676-X-24DC ATOS SP-15-DKU-200073P
ATOS DKU-1678-00 ATOS SP-15-DKU-200074
ATOS DKU-1678-X-24DC ATOS SP-15-DKU-200075
ATOS DKU-1700/2-00 ATOS SP-15-DKU-200081
ATOS DKU-1700/2-X-12DC ATOS SP-15-DKU-230070
ATOS DKU-1700/2-X-24DC ATOS SP-15-DKU-230080
ATOS DKU-1701/2/L3-X-24DC ATOS SP-15-DKU-230083
ATOS DKU-1701/2-00 ATOS SP-15-DKU-230086
ATOS DKU-1701/2-X-12DC ATOS SP-15-DKZOR-105193
ATOS DKU-1701/2-X-24DC ATOS SP-15-DKZOR-105393

DPF3-21
DPF3-25
DPF3-30
DPF3-35
DPF3-38
DPF4-42
DPF4-47
DPF4-50
DFP4-57
DFP4-60
放大器 插头式
EPC-110/10E0