Prior to lowering the top drive system or riggingdown, ensure that sufficient wraps of drilling line remain on the drum.
在下放或拆卸顶驱系统之前，要保证辊筒上留有足够的大绳圈数。
2
Mr Charest's bet seems to be that the police investigation, recently boosted with extra funds, will break down the silence of the construction firms implicated in bid-rigging.