lclun ::
BN135 ::
2010051602
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Canon PowerShot G9 44.4mm (35mm equivalent: 701mm), f/6.3, 0.0012 s (1/800), iso100 |
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From: lclun (Sep 21, 2010 08:01 HKT) Yes, it moves to counter balance the jib.
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From: howeichiun@gmail.com (Sep 17, 2010 18:03 HKT) when this tower crane boom raise up or raise down the ballast will move together |
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