Specifications for sectional overhead type doors 部分升降門規(guī)范
The code for checking and measuring of harbour electric - crane energy utilizing . part 2 : overhead type crane 港口電動起重機(jī)能源利用檢測規(guī)程第2部分:橋架型起重機(jī)
Standard for overhead type distribution transformers , 500 kva and smaller : high voltage , 34 500 volts and below ; low voltage , 7970 13 800y volts and below 500 kva及更小的頂置式配電變壓器的標(biāo)準(zhǔn):高壓34500v及以下低壓7970 13800y伏特及以下