工程方面英文陳述

In order to characterize the corrosiveness of air space in control room, the coupon testers shall be provided and placed in control room. The reactivity rate is then measured timely as a corrosive film growth on those coupons. The analytical service for characterizing the corrosiveness shall also be provided by... show more In order to characterize the corrosiveness of air space in control room, the coupon testers shall be provided and placed in control room. The reactivity rate is then measured timely as a corrosive film growth on those coupons. The analytical service for characterizing the corrosiveness shall also be provided by Vendor.

There shall be service access to the blower compartment properly sealed to preclude external air bypass of all stages of air cleaning.

請問這兩段該怎麼翻成中文比較好?
還有請問 coupon tester & 空調中的Media bed是什麼意思?

感恩~~~~急需協助
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