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| 51. | constant wall pressure ring |
| 等压环, 均压环 |
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| 52. | To surround on all sides;close in. |
| 围住四面围住；圈起 |
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| 53. | Random packings include conjugate ring, VSPring supper mini, pall ring, saddles and twin curved saddles. |
| 功堆填料有共轭球、四内弧环、环、梯环、尔环、鞍环、弧环等. |
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| 54. | below the surround or below the normal position. |
| 比周围低或者比正常位置低。 |
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| 55. | equipotential ring |
| 等势环;等位环 |
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| 56. | transfering loop |
| 移菌环|接种环 |
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| 57. | These rings are called gyres. |
| 这些环叫做转环。 |
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| 58. | equalizing ring |
| 均衡环, 均压环 |
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| 59. | cycloaliphatic epoxy |
| 环脂肪族环氧 |
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| 60. | above the surround or above the normal position. |
| 比周围高或者比正常位置高。 |
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