outer-protection and inner-support 外护内撑
Outer covering protection 外壳防护等级
protection of outer radiation [铁路] 外照射防护
Adopting special "armoured belt" outer protection is convenient to install.
采用特殊“装甲带”外保护，安装便捷。
Furnace and back-end enclosure wall all adopt membrane wall structure. The outside of tube wall is insulation material and is covered with trapezoid corrugated outer protection plate.
炉膛及尾部包墙均采用膜式壁结构，管壁外侧为保温材料并罩上梯形波纹外护板。
The implanting device comprises canal head, inner pipe, close end controller, middle pipe, wire pipe, outer protection mechanism, at least one locking wire and at lest one bracket pulling wire.
输放装置包括导管头、内管、 近端控制器、中管、导丝管、外保护机构、至少一根锁定丝和至少一根支架拉 线。
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