Modem materials enable the designers to construct a lightweight helmet, far from the days of leather cap with straps 0f the 1930's.

现代材料使得设计者可以造出轻巧的头盔，这和30年代用吊带固定的皮帽相去甚远。

youdao

The article analyzes characteristics and abrasion factor of leather cap type pig according operation feature, and then proposes reasonable magnitude of interference.

文章根据皮碗式清管器在钢质管道中的运行特点，分析了影响清管器皮碗的特性及磨损因素，给出了皮碗合理过盈量。

youdao

Leather cap type pig has higher abrasion during pigging gas steel pipeline. Furthermore, various elbow bend and tee joint need different suitable length pig or else easy to cause pipeline clog.

在燃气钢质管道清管过程中，皮碗式清管器受到的磨损较大，而且管道中各类弯头和三通件要求清管器的长度合适，否则容易造成卡堵。

youdao

In pubs in cobbled Tallinn, Estonia's perky capital, whose Hanseatic flavour now far out-smells its Soviet one, Mr Ilves, aged 44, clad in billy-cap and leather jacket, has an easy rapport with Estonia's go-ahead young.

ECONOMIST: Toomas Ilves, Estonia��s American-European

He was wearing a black baseball cap, and a black or dark coloured leather jacket with red piping.

BBC: Man sought over Dorset swan crossbow attack