三孔插座上有的保护接零（地）插孔，在采用接零保护时，有人常常仅在插座底内将此孔接线桩头与引入插座内的那根零线直接相连，这是极为危险的。因为万一电源的零线断开，或者电源的火（相）线、零线接反，其外壳等金属部分也将带上与电源相同的电压，这就会导致触电。接线时接地插孔应与的保护接地线相连。采用接零保护时，接零线应从电源端专门引来，而不应就近利用引入插座的零线。塑料绝缘导线为什么严禁直接埋在墙内？塑料绝缘导线长时间使用后，塑料会老化龟裂，绝缘水平大大降低，当线路短时过载或短路时，更易加速绝缘的损坏。
A10VSO140DFR1S/31RPPB12N0
A10VSO18DFR1/31R-PPA12N00
A10VSO71DFR/31R-PPA12KB3
A10VSO28DFR/31R-PSA12N00
A10VSO18DFR1/31R-PPB12NOO
A10VSO140DFR1/31R-PPB12NOO
A10VS28DR/31L-PPA12K001+ AZPF
A10V028DR/31K-PSC62K01
A10VS28DR31L-PPA12K01+A2PF-1X
A10VS045DFR/31R-PPA12NOO-SO32
A10VSO2BDR/30R-PPA/2
A10VS0140DFLR/31R-PPB12N00
A10VSO28DR/32R-PPA121V00
A10VG45EP20/10L-NTC10F025CSL
A10VSO100DFR/31RPSB12K24
A10VS045DR/31R-PPA12N00
A10VSO100DR/31R-VPA12N00
A10VS0100DFR1/31R-PPA12N00
A10VSO140DR/31R-PPB12NOO
A10VS045DR/52R-PC12N00
A10VS180FR1/31R-PPA12N00
A10V045DFR1/31R-PSC62K02
A10VO28DFR1/31L-PSC62N00
A11VL0190LRDU2+A10V028DR/31-KK
A10VS028DFR1/51R-PSC12N00-L
A4VG125EP2/32+A10V028DR/31
A10VS071DFR1/31R-PPA12N00
A10VS0180DR/31R-PPA12KD1
A10VS071DFR/31R-PPA12N00
A10VS0140DRS/32R-VPB12N00
A11VL0190+A10V028+G2
A10VSO140DFR1/31R-PPB12N00
AE-A10VSO140D/31R-PPB12N00
A10VS071DR/31R-PPA12N00
A10V0100DR/31R-PSC11N00
A10VO28DR/31R-PSC62K-01-S1581
A10VSO 28 DR/31R PSC12 N00
A10VS0140DR/32R-PPA12N00
A10VS0100DR/31R-PTA12N00
A10V028DR/31R-PSC62K01
A10V028DFR1/31R-PSC62N00
A10VG45EZ2DM1/10L-NTC10F023SHK
A10VG45EZ2DM1/10R-NSC10F013DH
下面就是详细对无机高分子结合剂制作磨具的设计原则和方法、制作无机高分子复合材料磨具高速重负荷、荒磨磨具、磨削磨具、深切磨削、缓进给磨削磨具、快速点磨削磨具、磨削磨具、主轴及其轴承磨具、率磨床磨具、钢轨打磨磨具、砂带磨削的工艺方法提一些粗浅的看法。无机高分子结合剂磨具的设计原则和方法在砂轮设计制造中应考虑如下几个题目：首先应考虑加工的材料的机能和材料加工表面的精度，然后选择合适的磨料、粒度以及混合磨料的磨削使用。
