See Annex A for an example of a requirement specification for a payment metering system based on an existing system using one-way token carriers and transferring energy credit units. 使用一种特定的存储介质来传递能量数据信息的付费计量系统的实例请参见…
电通量(electric flux)
图示: 公式: d ϕ E ⃗ ⋅ n ^ d A d\phi \vec{E} \cdot \hat{n} dA dϕE ⋅n^dA
也可以写作 d ϕ E ⃗ ⋅ d A ⃗ d\phi \vec{E} \cdot \vec{dA} dϕE ⋅dA 还可以写作 d ϕ E d A c o s ( θ ) d\…