毎日1問、正解者には6つの富を、参加者には2つの富をプレゼント；8月07日

2016-08-07View Original

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判断問題：各種の機械電気装置（工作機械を含む）において、連続的に動く（回転や往復運動をする）2つの部品の間のシールは、動的シールに該当する。（）答え：√

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毎日1問、正解者には6つの富を、参加者には2つの富をプレゼント；8月07日

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