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hold-down ring：压紧环

hold-down packer 悬挂式封隔器 | hold-down ring 压紧环 | hold-down slip 防止上移的卡瓦

hold-down slip：防止上移的卡瓦

hold-down ring 压紧环 | hold-down slip 防止上移的卡瓦 | hold-down 压住

Down wools：塘种羊毛

down wool ==> 丘陵种羊毛 | Down wools ==> 塘种羊毛 | Down''s process ==> 道恩法

Other thefts and handling down 6：其他盗窃和处理下降了6

Other burglary down 5%其他爆窃案下跌了5 % | Other thefts and handling down 6%其他盗窃和处理下降了6 % | More serious violence down 13%更严重的暴力下降13 %

Pull down List Box：下拉式列表框

下拉菜单 Pull-Down Menu | 下拉式列表框 Pull down List Box | 下母线 Down Highway DHW

up-and-down indicator：紧松指示器,松紧指示器,走时指示器

up-and-down draught kiln ==> 倒焰窑 | up-and-down indicator ==> 紧松指示器,松紧指示器,走时指示器 | up-and-down locks ==> 安全锁

up-and-down line：到發線

11063 up-and-down hump yard 雙向駝峰編組站 | 11064 up-and-down line 到發線 | 11065 up-and-down track 到發線

up-and-down motion：垂直方向往复运动

up-and-down maneuver ==> 升降机动 | up-and-down motion ==> 垂直方向往复运动 | up-and-down movement ==> 垂直往复运动,垂直运动,升降运动,上下运动

up-and-down traffic：上下行運行

11065 up-and-down track 到發線 | 11066 up-and-down traffic 上下行運行 | 11067 up-and-down trains 上下行列車

step-down ratio：降压比

step down n. 缩小 | step down ratio 降压比 | step down side 降压侧

Meeting of Claimants：债权人会议

meeting end on 对遇 | Meeting of Claimants 债权人会议 | meeting room 会议室

belt tightened：张紧轮

belt pulley face 皮带轮表面 | belt tightened 张紧轮 | belt drive 带式传动