The scientists found that the ship's builder, Harland and Wolff, in Belfast, struggled for years to obtain adequate supplies of rivets and riveters to build the world's three biggest ships at once: the Titanic and two sisters, Olympic and Britannic.

科學家發(fā)現(xiàn)船的建造者性爱一级毛片，哈藍德和沃爾弗曾在貝爾法斯特花了數(shù)年功夫來尋找充足的鉚釘和打鉚機來同時打造世界上最大的三艘巨輪，泰坦尼克號和其他兩搜兄弟巨輪，奧林匹克和大不列顛。

The noise of Trial pilots was mainly intermediate or high frequency, and that of Riveters was high frequency.

試飛車間的噪聲為穩(wěn)態(tài)噪聲398AV影视，主要是以中高頻為主，鉚工車間的噪聲為非穩(wěn)態(tài)噪聲91精品色国产综合久久久，主要是以高頻為主国产一级一片免费播放放。

Methods: The sample of 703 aircraft-made workers (522 riveters, 181 test pilots) was chosen randomly and field hygeian survey in aircraft-made site were carried out, as well as hearing test was done at the same time.

用整群抽樣的方法在某飛機廠抽取703名飛機制造工人（其中鉚工工人522名和試飛工人181名），進行現(xiàn)場衛(wèi)生學調(diào)查和聽力測試久艹只有精品。

Results showed: The rates of Riveters's tinnitus, deafness, insomnia, dizziness, fatigue and tympana sunken, incrassated, perforated were higher than those of Trial pilots, and all had statistically significant difference P

結果表明：鉚工耳鳴国产精自拍、耳聾超碰在线免费精品、失眠变态另类一区二区三区不卡、頭昏、疲乏国产日韩欧美丝袜、鼓膜內(nèi)陷过产自拍视频在线、增厚和穿孔檢出率均高于試飛，除頭昏和疲乏外欧洲免费A区B区视频，其余均有統(tǒng)計學意義P

The scientists found that the ship's builder, Harland and Wolff, in Belfast, struggled for years to obtain adequate supplies of rivets and riveters to build the world's three biggest ships at once: the Titanic and two sisters, Olympic and Britannic.

在新興的信息產(chǎn)業(yè)欧美丝袜在线第一页，中國企業(yè)以高科技為師，增強和外國企業(yè)的交流與合作黄色操逼视频网站，提高產(chǎn)品質(zhì)量在线免费观看的黄页。