The ear is surrounded by the ear cups which form an almost airtight seal and cuts out disturbing outside noise. [adjective]
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The gaskets keep the containers airtight and prevent the baby food becoming contaminated with bacteria, molds or insects. [adjective]
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If the wind blows into the mouth of a tube it causes an increase of pressure inside and also of course an equal increase in all closed vessels with which the mouth is in airtight communication. [Please select]
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This test will show if the bag is airtight. [Please select]
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The tube and cup should be well soldered on the seams to make them airtight. [Please select]
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Close the other end with the same operation; this makes the tube airtight. [Please select]
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Flour barrels will not do-they are not strong enough, nor can they be made perfectly airtight. [Please select]
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There is no danger, as the airtight barrels cannot possibly sink. [Please select]
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One of these plates is connected to metal top, and the wire from the other passes through the tube B, which is filled with melted rosin or wax, to make it airtight. [Please select]
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