Through using the self-designed loading device, the permeability of coating concrete chloride ion with concrete protective coating and different brush coating times has been researched in this paper.
本文利用自行设计的加载设备对混凝土保护涂层及涂层涂刷次数等不同情况下的氯离子渗透性进行了研究。
The toothbrush has a 'top- loading' structure in which the cartridge is housed in a recess at the brush end of the toothbrush handle, the recess being accessible by removing the brush head.
该牙刷具有“顶部装载”结构体，其中所述筒容纳在位于 牙刷柄部的刷端的凹槽中，所述凹槽可通过移除牙刷头部而进入。
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