进线口 meaning in English

incoming line
service entrance
serviceentrance

Allow for 20 service openings through the diaphragm wall
有20个管线进线口穿过连续墙。
Note : please noted the inlet ' s number and specification when the customer ordering
注：进线口数量与规格，请用户在订货时注明。
If ordering please indicate the number of sockets , voltage , current , the number of inlet , direction and specification , if need outlet wire , please offer the direction , number and specification ; if want chief switch , please show the currents and poles
订货时应注明插座数量,对应的电压和电流,进线口数量,方向及规格,如需要配出线口,请注明方向数量及规格:如带开关请注明开关的电流大小及极数