A crane is a lifting machine, generally equipped with a winder (also called a wire rope drum), wire ropes or chains and sheaves, that can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. Cranes are commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment.
圖片編號:
11980196
拍攝者:
Tadnar
點數下載
授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
---|---|---|---|---|---|
標準授權 | XS | 480 x 360 | JPG | 13 | |
標準授權 | S | 800 x 600 | JPG | 15 | |
標準授權 | M | 2000 x 1500 | JPG | 18 | |
標準授權 | L | 2581 x 1936 | JPG | 20 | |
標準授權 | XL | 3320 x 2490 | JPG | 22 | |
標準授權 | MAX | 4000 x 3000 | JPG | 23 | |
標準授權 | TIFF | 4695 x 3521 | TIF | 39 | |
進階授權 | WEL | 4000 x 3000 | JPG | 88 | |
進階授權 | PEL | 4000 x 3000 | JPG | 88 | |
進階授權 | UEL | 4000 x 3000 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 480 x 360 px | JPG | 13 點 |
標準授權 | 800 x 600 px | JPG | 15 點 |
標準授權 | 2000 x 1500 px | JPG | 18 點 |
標準授權 | 2581 x 1936 px | JPG | 20 點 |
標準授權 | 3320 x 2490 px | JPG | 22 點 |
標準授權 | 4000 x 3000 px | JPG | 23 點 |
標準授權 | 4695 x 3521 px | TIF | 39 點 |
進階授權 | 4000 x 3000 px | JPG | 88 點 |
進階授權 | 4000 x 3000 px | JPG | 88 點 |
進階授權 | 4000 x 3000 px | JPG | 88 點 |