The filters are comprised of a clay pot set inside a plastic bucket with a nozzle at the bottom of it.

该过滤器其实就是一个涂敷胶体银的多孔过滤陶罐装在其底部开有水嘴的塑料桶里。

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The precise formulas, for calculating thickness of X-ray balanced filters made from metal foils or oxide-plastic films are deduced from the principle.

本文从平衡滤光片的原理，推导了金属片型和塑料氧化物型平衡滤光片的最佳厚度计算公式。

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The respirable dust samples were collected on 37 mm cellulose acetate filters (pore size 0.8 mm) placed in a 37 mm conductive plastic cyclone.

呼吸性粉尘的样本收集三七毫米醋酸纤维素过滤器（孔径0.8毫米）放置在一个三十七毫米导电塑料气旋。

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The plastic filters are incredibly efficient and cost-effective for two reasons.

FORBES: "Plastic Bottle" Filters Can Help Millions Poisoned by Arsenic-Contaminated Water

But due diligence for Summa--which makes plastic components like filters, valves and conveyor belts for lighting, electrical devices and food processing--is a devotional exercise.

FORBES: The Race To Embrace

But due diligence for Summa--which makes such plastic components as filters, valves and conveyor belts for lighting, electrical devices and food processing--is a devotional exercise.

FORBES: The Race To Embrace