<dfn id="8aw0k"></dfn>

<samp id="8aw0k"><pre id="8aw0k"></pre></samp>

<samp id="8aw0k"><pre id="8aw0k"></pre></samp>

單項選擇題

Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use（）.

A.Gun tackle
B.Luff tackle
C.Two-fold tackle
D.Double-luff tackle

你可能感興趣的試題

單項選擇題

Manila slings should not be used to load（）.

A.cotton
B.lumber
C.steel
D.tires

單項選擇題

Instead of whipping an end of a line，a temporary means of preventing the line from unraveling is to tie a（）.

A.becket bend
B.blackwall hitch
C.figure-eight knot
D.square knot

<samp id="uego0"></samp>

<strike id="uego0"><s id="uego0"></s></strike>

<th id="uego0"><menu id="uego0"></menu></th>

<samp id="uego0"><tbody id="uego0"></tbody></samp>