slot trough
... stand-by power 备用电源 slot trough 沟槽距 transformer ratio (变压器)变压比 ...
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如内外沟槽卡尺、钢丝绳卡尺、步距规等量具是以固定形式复现量值的测量器具。
Such as list, wire rope caliper, groove caliper step distance measuring tools and fixed form such as customs reiteration of the value of measurement appliance.
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