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单词
mine signal system
释义
mine signal system
mine signal system
[
′mīn ′sig·nəl ‚sis·təm
]
(mining engineering)
Signal lights installed at individual track switches immediately indicating to the motorman whether or not it is safe to proceed.
随便看
arllc
arl-lv
arl-m
arlmss
arln
arlna
arlo
arloc
arlon
arlon badminton club
arlp
arlpac
arlpc
arlpi
arl/psu
arls
arl-stb
arlt
arlta
arltab
arlt, carl ferdinand von
asnr
asn(r&d)
asn rd&a
asn(rd&a)
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更新时间:2025/6/28 2:42:26