In pressure vessels, C and D seam which are located at the joint of flange, tube-shape object, jointed tube, and head of pressure vessels separately are the most complex seams.

压力容器设备中法兰与筒体、法兰与接管连接处的C类焊缝和封头端部、筒体上马鞍形的D类焊缝是最为不规则的且施焊工艺最为复杂的焊缝。

youdao

We put a lot of pressure on them to be out there first, '' said Peder Holk Nielsen, head of Novozymes's enzymes unit. ``This is one of our must-win battles.

“我们给他们施加了不少的压力，鼓舞他们争夺第一”彼得·霍克·尼尔森---诺维信生物酶联盟的头头，如是说，“这是一场我们必须要赢的战役。”

youdao

The average head weighs 7 to 8 pounds—a lot of pressure to be putting on your face every night.

头部平均重量是7-8磅——趴着的话对脸部可是不小的压力。

youdao

Christine Williamson, head of the pressure group Silicon Support UK, said artificial implants had ruined the health of many women.

BBC: Breasts

Dmytro Sherembey, the HIV-positive head of the patients' pressure group which helped organise Liza's appeal in parliament, the Ukrainian Community Advisory Board, predicts licences will be issued to those who pay bribes.

BBC: Ukraine's youngest HIV campaigner

Under public pressure, the head of the judiciary issued a directive this week banning detention without trial.

ECONOMIST: Iran