大连帝国屏蔽泵配件:H2S trim是什么意思啊?

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如题,请指教!

h2s是硫化氢
trim是
trim
KK: []
DJ: []
vt.
1. 修剪;修整;整理[(+off)]
He trimmed his hair carefully.
他仔细修剪头发。
2. 削减,缩减;切除[(+off/away)]
The government is going to trim welfare programs.
政府将削减福利项目。
3. 装点,布置[(+with)][(+up)]
The children were trimming up a Christmas tree.
孩子们在装饰圣诞树。
4. 调整(船帆等)
5. (调整负载)使(船,飞机等)平稳
The sailors trimmed the boat.
水手们调整负载使船平稳。
6. 改变,修改(意见,政策等)
Sometimes it is necessary to trim those policies.
有时需要改变原先制定的那些政策。
7. 【口】痛打
8. 【口】欺骗
9. 【口】训斥
vi.
1. 消减;调整
The school budgets trimmed back considerably.
学校预算大幅度削减。
2. (帆)修正方向
3. (船,飞机等)获?

就是硫化氢,要平舱