Travelling Block



Features:

The sheave grooves are intermediate frequency quenched so that the surface hardness will be improved and the service life will be extended.

? The side plate assembly is made of thick steel plate, with enough strength.

? The sheaves and the bearings are interchangeable with those of corresponding crown blocks.

? Quenched and tempered alloy steel shaft with lubrication hole of each bearing.

? The travelling blocks are in accordance with API Spec.8C and API monogram can be used.

copyright ? 2021 中曼石油天然氣集團(tuán)股份有限公司 . ALL RIGHTS RESERVED 滬ICP備08116516號(hào)-1

小恩雅透明内抹油,荒唐的山区mU子,男女一上一下的软件,ヘンリー冢本videos,良娣收藏不迷路,51mh.ifnocc官网入口,sHKD脱狱者,怪物粗XXⅩXX无尽,火辣辣内江市教育welcome,糖心VIog官方入口