地下管道阴极保护  Cathodic protection of underground pipeline

软管保护管  hose protector

保护下放  protection down; protection devices arranged near switchgear

超距离下保护层  low protected seam with ultra distance

挠性管下管机  tubing injector

下保护层  lower protective seam; under-protecting coal stratum

下保护层开采  lower protective seam mining

压力下下管柱  running under pressure

远程下保护层  Long-range Protective Layer

远距离下保护层开采  far distance lower protective seam exploitation

95%Al2O3超长热电偶保护管  Elongated thermocouple protecting tube made of 95% Al2O3

版权保护管理系统  copyright protection management system

保护管  protecting tube; protecting housing; ducts; protective pipe; protection tube; protective tube; guard tube; protective shell

保护管理  Protection and management; Protective management; Conservation and management; protection administration; Protection; the management of protection

保护管理对策  countermeasure for the protection and management

保护管理机  protection manage computer

保护管理论者  conservationist

保护管理体系  protection management system

保护管束  probation

材料保护保养  material protection and maintain