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臨榆縣
释义
臨榆縣
lín yú xiàn
县名。位于河北省抚宁县东。地据长城东端,扼北宁铁路之中枢,城之东门即山海关。县西南为秦皇岛,是冬季不冻港。
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alkyne conversion
alkyne hydrogenation reactor
alkynes
alkyne series
alkynoate
alkynoates
alkynoic acid
alkynol
alkynone
alkynyl
alkynyl-
alkynylated
alkynylation
alkynylations
alkynyl compound
alkynyl compounds
alkynylene
alkynyl Grignard reagent
alkynyl group
alkynyl magnesium halide
alkynyl metal
alkynyl sulfide
alkyol resin
alkyoxycarbonyl
alky plant
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更新时间:2026/10/2 9:51:34